holley sniper backfiring and stalling. 0_66-b17) Java HotSpot(TM) 64-Bit Server VM (build …. 350 Chevy Accelerating Sputters When Tbi. The Edelbrock Pro-Flo 4 intake …. IAC reading was Zero, Throttle linkage was so hard you could barely move it by hand. Backfiring during acceleration occurs when ignition takes place in the intake or exhaust instead of the combustion chamber. Let’s know about 5 reasons that cause car backfire. I've cleaned and rebuilt the Carter YF carb on my '61 Apache, and the Holley Performer on my '60 Impala. They greatly reduce the potential for air to enter into the fuel system, which can result in poor engine performance and/or engine stalling. Re: '85 CJ7 6 Backfires on downhill idle. Sniper EFI Initial Startup and Troubleshooting. while stopping for a stop sign car wants to almost stall. Yes it improves things across the board, however it's a 4500lb brick w/ zero aerodynamics. Swapped back on the non-adjustable rotor and made the tune change back (via the handheld) to CD ignition box as the ignition source. My Sniper ran fine for a few hundred miles, then it started with the above mentioned bad manners. I had a mechanic install a Holley Sniper EFI. Holley Sniper EFI self-tuning fuel injection systems deliver all the benefits—and none of the hassles. The PDF installation instructions are on their website and they even have a great video on it. I'm struggling with bogged down acceleration and backfiring when the engine warms up past 195°F. First off, I picked up a 1984 GT350 a couple of years ago that had most of the original parts in it yet, including the dial snorkel air cleaner. Hello All - Newbie Here - wanting to share a recent find. Static timing is usually set in the 15 to 20 degree range, depends on the engine. Since I had that, I just had to use it. The pump should be on the float bowl for the front cylinders with the pump cam and screw going in the area between …. Posted: Sat Oct 16, 2021 4:16 am Post subject: Re: Holley Sniper Conversions. I assumed it may be exhaust leak. This 30 KPa would be the vacuum reading, 1KPa = …. Are you tired of rebuilding the 50+ year old Rochester Quadrajet Carburetor on your 1968-1981 Corvette or for that matter; any other classic Chevrolet, GMC, Buick, Oldsmobile, or Pontiac? Our Holley Sniper EFI Quadrajet "Throttle Body" is your remedy!The first bolt on spread bore electronic fuel injected throttle body. I went with a Holley Sniper and the Sniper (tanks inc i think)fuel tank with in-tank pump, etc. Check the oil level in the blower. This tends to happen on Ford trucks Introduction. Introducing the Holley High-Horsepower Super Sniper 4150 EFI. As I mentioned before the WOT AFR setting is at 12. Sniper EFI in-tank fuel pump LS Swap. TPS (Throttle Position Sensor) - Should read 0. Shut off the engine, ensure power to the Sniper is switched off. [BKEYWORD] Holley sniper stalling at idle. 4150 Sniper EFI (550-510 Shiny, 550-511 Black, & 550-516 Gold) 2 Holley Sniper EFI FUEL INJECTION INSTALLATION MANUAL Read this …. Shut off the engine, ensure power to the Sniper …. It acts like it's not getting any fuel, runs rough …. Any fast opening of the throttle results in a backfire through the intake though. Watching the handheld will sometimes show you tach blips but to be sure you need to look at …. So to do that, I disconnected the white wire from the 10 pin Holley harness, to the MSD DIGITAL 6AL box (#6425) points trigger (also a white wire). This is better known as retarded timing. The ratio of air to fuel in the mixture gets skewed in favour of fuel i. This worked but made some back pressure so I removed the small but nice metal lines and then ran a 3/8" Return Line and that did the trick, perfect recommended Fuel pressure. The Sniper EFI Throttle Lever Extension provides significantly decreased pedal effort and a smoother pedal feel. It was backfiring, stalling, etc. About On Acceleration Backfiring Harley 7,367 likes · 3 talking about this · 1,366 were here. Ive been running a Holley Sniper for a about four years now. Be aware that they need to know a lot about your vehicle and the modifications you have made to it in order to diagnose your issue. The car would start and idle great, rev in neutral great, and then as I would drive it, it would backfire, stall, not want to re-start, etc. Sniper hot start | Team Camaro Tech. If your car or truck is equipped with a Holley four barrel carburetor and stumbles upon acceleration, more than likely the carburetor needs an adjustment to the accelerator pump assembly. com: Holley 550511 Fuel Injection : Automotive. Holley sniper stalling at idle Sniper EFI throttle bodies require 58-60 psi of fuel pressure and a 10 micron filter If it is a faulty fuel pressure regulator, then the mechanic can The Ford hanger and Aeromotive pump were $207, stalling, surging, backfiring…. Switch power to the Sniper on and crank the engine. Fine tuned the timing to 12-15 degrees. Remember that backfiring is caused by skewed ratios in the air-fuel mixture. Holley Carburetor 4160 Street 600 CFM Polished Aluminum 4V With V-Bowls. There are multiple possible solutions and costs can vary quite a bit. Once above 160 degrees, turn the idle speed screw so that the idle is about 50 RPM below your target idle speed. 5 hours to realize that the problem COULD be because my main tank has no venting from the fuel tank, so when I go into gear its putting too much torque on the ssyte, and the EFI system doesnt have enough response time. Jan 28, 2004 · I have a 98 MXZ 500 that has only been out twice this year. On quick acceleration, the engine stalls. com :: Performance/Engines/Transmis…. Sniper EFI If this is your first visit, be sure to check out the FAQ by clicking the link above. It would seem to hesitate and cut out for a split second. This case study is on a 1996 Chevrolet Blazer with a 4. Option 1 is to purchase and install one of the Holley EFI Dual-Sync Distributors on your engine. Holley recommends 3/8" fuel lines which I ran to the Sniper but kept the small factory Return line. As far as this issue - my thoughts/. Car has run perfect every time and has never hesitated or stalled since. I've got a Holley Street Dominator intake manifold with my FiTech. I've got a 1981 CJ5 258 with a Howell …. About Coming Sniper Stop Holley Stalls A When To Classic Car Deals. This is normal and will not effect the life of the blower or the engine. If I accelerateWhen accelerating slowly, the engine sputters and misses (and sometimes even backfires) with the throttle position just above idle. After this has been done, you can begin adjusting all of the idle mixture screws. The float level in the back bowl is too high which is causing fuel to push out the vent and into the engine when you let off or the timing is going …. I’ve felt like Holley was on it as far as support. 1990 Ford F150 XLT Lariat 351 V8 5. 4) Advance the timing to 17 degrees (yep …. Preparing a carburetor for use in a …. Please consult the Holley Sniper full manual and use this guide for supplemental clarification. 0 Ohm Black 4-Cylinder/6-Cylinder. 0, fitech efi, holley in tank returnless pump. If you add the cost of a single plane manifold to the Sniper you start getting close to what the Pro-Flo 4 costs. Full product line and accessories at excellent pricing. Since the shield was put on, not a single problem, not one. The Holley forum suggested my issue was timing related, that the MSD 2 wire dizzy, the phased rotor, etc was my issue and suggested I go Hyperspark. Edelbrock 600cfm carb is 6 months old. 0_66" Java(TM) SE Runtime Environment (build 1. This is the original 1979 350ci small-block. stalling, surging, backfiring, stumbles, or poor vehicle drivability when the vehicle is cold. One thing you have to do if the computer is going to run things is disable the weights and vacuum so that trigger signal becomes fixed in relation to the engine. I noticed the coolant temp reading was fluctuating between 164°-155°F. Hello, I have a 1995 Mercruiser 350 Mag 5. 1973 mustang 351 with holley carb stalls when first trying to accellerate, idles fine, good accelleration after passing flat spot, timimg correct, …. Hopefully someone here with more …. Make sure that the float levels are set properly at 7/16" per the carburetor owners manual. If it goes higher than normal, this could be the problem. Recommended for Sniper EFI BBD, 550-858,550-859 or 550-860 Billet distributor housing provides corrosion resistance and stylish looks! Patented Clear Installation cap eliminates any confusion while installing …. (2) Check float for being loaded with fuel, bent float hanger or binding of the …. Avoid using any 90-degree fittings between the tank and pump. Since timing is now locked, I started car and set. 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks - Retro fit fuel pump from Holley - I am ordering up a Holley Sniper EFI kit and deciding on …. Removed all the unused wires from harness and wrapped all the remaining wires and harness with rfi shielding tape. It could be a nice feeling when you change this defective fuel pump …. Spark plug wires for holley sniper. Got the intake on and computer up and running, fuel pressure 39psi with no vaccum on …. Carburetor Installation and Tuning. im going to buy a BN carb and rebuild the holley …. The car idles fine and if you accelerate very smoothly with a light throttle, it seems fine. A sticky or burned exhaust valve can also cause some backfiring out the exhaust. If I don't head home right away, the engine stalls out and I'm dead by the side of the road. Dynatech long tube headers with 3" Dynatech exhaust. 50-15 M/T slicks 09 Nissan Titan tow vehicle 94 camaro stick shift toy. FULL PRODUCT VERSION : java version "1. Problem is after it warms up for a few minutes it will pop through the intake with if I rap the throttle. The 100KPa atmospheric pressure is reduced to 70KPa (in my case), so there is 30KPa loss. Scoop is absolutely right, use new gaskets only when you put it together. It is installed on a 427 with unknown cam. update email from holley tech dept : After watching the videos you provided I would …. Once you have gone through all 10 of these EFI Tech Tips, if you are still having problems, only then should you reach out to the Holley Sniper Tech Support line at 1-866-464-6553 or via email through the Technical Services E-mail System. The original Holley Sniper instructions are available on the Holley website if you have misplaced them. The motor ran fine with the carburetor, though it wasn't always consistent, but I've never really had too many issues. How To Install A Sniper EFI Fuel Pump Module Kit Into A Shallow Fuel Tank. Everything has been gone through, there is one thing I need to check with Holley tech support. Couple weeks ago is was surging on hot startup, and I heard backfires off throttle on highway. Holley Sniper EFI Self-Tuning Kit Black Ceramic Finish. but I can adapt the holley to fit By drilling and. The rear end is a 12 bolt unit from Currie with 3:55 gearing. Holley Sniper EGFI Hyper spark Ignition (556-151) 4. Adjusted the fuel map a bunch and we got it starting and running ok. It needs to have an 80-100-micron pre-filter installed between the tank and the pump in addition to a 10-micron filter between the pump and …. Except the down shift stalling …. It needs the tip pointed down at least 10 degrees from horizontal and at least 15 degrees from vertical I prefer about a 45 degree angle from horizontal. We have 1 Holley Sniper EFI Stealth 4500 manual available for free PDF download: Installation Manual. Edelbrock 1406 Performer – Best Overall Carburetor For 350 Chevy. carb back in on Friday and it started right up. Overall I'm really glad I did the Holley Sniper, No more backfiring, Easy perfect starts, No stalling off-road at extreme angles or large bounces …. Now it's a 350 Holley Terminator EFI with a TKO600, Moser 12 bolt (3. your engine can actually run pretty dam rich without stalling. Holley's Dominator line of carburetors were designed for competition use. Edelbrock carb or Holley sniper efi?. Sometimes, the engine gets the supply of fuel more than it can burn. The engine builder recommends 10° initial timing, but after the backfires I bumped it up to 14° with no change. SNIPER NITROUS SYSTEMS P/N 07002NOS, 07003NOS, & 07007NOS Part Number 07002NOS Shown GENERAL INFORMATION The Sniper …. 1968-1981 Holley Sniper EFI Quadrajet Spread Bore Throttle Body Upgrade. If excessive dirt is found, remove the carburetor unit. Like mentioned, people in the market for a short runner sheetmetal are looking for high rpm power. Sniper EFI throttle bodies require 58-60 psi of fuel pressure and a 10 micron filter. 1) My spark control is bad or something with the ignition that I can't figure out. Again I don't know if it's the same as the fitech but you may be able to adjust the amount of fuel the sniper adds during a hot restart to eliminate the surge you mentioned. Timing settings are 15 degrees at idle, 30 WOT, 32 cruise. Truck rpm dropped to 385rpm when coming to a stop and sometimes stalls. you will need a GOOD timing light, and a vacuum gauge. 1966 inline 6 engine bogs down and stalls out when. Search: Atv Backfiring Through Carb. If you datalog the Sniper ECU and see multiple overlapping traces for the same signal, you likely have RF-induced problems. The stalling when cold could also be a lean condition. We're not talking about grandpa's 454 here either - we're giving away 1000+ Horsepower in this 632 cubic inch fire-breathing monster built by Prestige Motorsports with an array of Holley …. I am currently looking to put a Holley Terminator Stealth 550-442 P. Installations is the easiest part of Sniper install. If needle is defective, replace with a Holley matched set. My '93 Jeep Grand Cherokee with the 5. Considering buying a Holley Sniper EFI system and Holley distributor. Remove the two wing nuts and remove the top of the air cleaner assembly. This happens no matter what speed I am going, off of start, or at 30, or at 50. The handheld is useless for tuning when real tuning is required. Doing so can ruin your suspension system and is too powerful. Tried to start car, but it would turn over & and backfire. I am not sure if it should be on the MSD now that the Sniper is in or run off the "Tach out" on the Holley. Holley Performance Products has written this manual for the installation of the Sniper EFI TBI fuel injection system. A small bead of RTV silicone goes around each port on the manifold side of the gaskets and on the end seals. Over all, I'm very happy with it. And the preset regulator on the intank unit was defective giving me 68 psi. holley sniper efi iac problems. Here are some of those negative effects that Seafoam has done based on past user claims: 1. If you have never replaced your fuel filter before it may be a good idea to inspect and replace it if necessary. I was looking at the FiTech based on price but the difference really is not that much and the more I read about the sniper it seems to be the better of the two. When taking on a no spark condition, one needs to be patient and have an open mind. Troubleshooting - backfire through carburetor. I have a 383 stroker in a '69 Camaro. at 55mph and stop for a stop sign. The bike starts real easy and idles fine but its backfiring …. Gr8dain just installed the Holley Sniper kit this past weekend. there is more fuel and less air. Introducing the Holley High-Horsepower Super Sniper …. just my 2 cents on this one, iv had this problem before. RE: Holley replacement? - makar: 2/11/2021 13:22; RE: Holley …. Extending wires with too small of a wire gauge will also result in the same damage. Holley 550511 Fuel Injection, Fuel System. About Sniper Efi Misfire Holley. FAQ: Members List: Social Groups: Calendar: Search: Today's Posts: PY Albums that is known good while you sort this out. Major difference would be ease of installation with the Sniper, less clutter in the engine bay, and the Sniper …. Hi Ben,try 69 primary main jet,134-39 secondary plate,65 power valve,discharge nozzle. 1; 2; First 2 of 2 Go to page V-Twin Harley Davidson forum. Enable the Idle Spark Control and set it to 20-P Term and 40-D Term. The one additional problem to overcome is how to work the EFI with your dual fuel tanks. Manufactured using the highest grade materials and the latest technology, they deliver Top-grade fuel system upgrade that will take your …. Search: Holley Sniper Efi Misfire About Holley Misfire Efi Sniper Recent Posts VM RX BL OB C2 80 GJ 1G 6G XE YW L6 MT X4 V6 MO KO D1 2V 7V What is Holley Sniper Efi Misfire Joined Nov 2, 2011 · 169 Posts. 4R70W transmission with USShift quick 2 controller. The sniper does not report fuel pressure. Had a quick look on farcebook at the Sniper groups and the first thing I saw was a barrel filling up with fuel above the butterfly due to a failed …. So my assumption is that the Sniper is adjusting/learning the fueling requirements. It is exactly the same wiring diagram and software! there is some key wording changing here but essentially holley is saying the same thing. nicholas dean anderson, Kendall Lawerence Anderson Sr jennifer e sutton (aka jennifer s sutton, jennifer s anderson and jennifer e anderson), Omary D …. Small company with a huge EFI product line. Troubleshooting - backfire through carburetor Bill Tichenor 12/02/2009 10 min read Carburetor Installation and Tuning Video carburetor tuning and adjustments video Footage taken from Holley Carburetor Installation & Tuning DVD author Bill Tichenor 358 Posts An Article About Carburetor Installation and Tuning Video carburetor tuning and adjustments. After working on things for quite some time, with me and a mechanic (different one than installed) spending a lot of time on Holley forums and making changes, we found several mistakes made during the install. Holley carbs run on the idle circuit up to about 2000 …. I've got about 1000 miles on the Sniper (2,000 miles on a rebuilt engine) and it has been running pretty good up until this point. It currently has a Holley EF/pump and all I am doing is making everything new. I don't do a lot of towing but when I do I have no …. Basically it gave me all sorts of nasty behavior. 72 Chevelle Malibu Muncie M20 SBC 406 KB Pistons PW Aluminum heads RPM Air Gap Intake MSD 6AL2 Holley Sniper EFI Holley Dualsync Stainless Long Tubes to 2. Together with the unburned fuel in the exhaust system and an open exhaust, the sparking results in the. I then come down a small hill and a stop sign. Malvo's crimes, at age 17, were so troubling. Turn them slowly clockwise and counter-clockwise until …. Holley 46-74 / Throttle Solenoid Holley 4 Barrel Model 4150-4160-4165/75. If you follow these instructions you can set the ignition configuration as follows: Ignition Type: Holley Dual Sync. I also unplugged the 2 wire (purple/green) harness from the 7 pin Holley harness and MSD distributor. only thing Fi Tech has going for it is it will bolt right up to my 4500 c454 intake. I'd like to try and fix it myself rather than get it towed to the mechanic, does anyone have any experience with the Sniper …. "Understanding How to Make a Holley Sniper or HP crank sensor". Most of the carburetors installed on the 350 use a single air/fuel mixture screw, while some carburetors use two. It's interesting to hear that it doesn't have the best results in the V8. Got the intake on and computer up and running, fuel pressure 39psi with no vaccum on port, idles the same as it did with the carb. In general, backfiring on deceleration (as opposed to acceleration) is generally caused by a Any misconnected or leaking carb vacuum hoses can also encourage backfiring. Three new fuel pumps including a HydraMat . Ford F150 engine backfiring, running/idling rough. This means that armor is more resistant to weapons that use more projectiles with smaller damage outputs (shotguns, machine guns) when compared to weapons that use a small number of projectiles that deal more damage (snipers, explosive-based weapons). It felt like it was flooding out at low speed, low RPM. Congratulations on your purchase of a new Sniper EFI Throttle Body System built NOTE: This Quickstart Manual covers NON-Timing Control Ignition Options. With my converter stalling to 4500-5000 rpm, who cares about a loss at 2500-3500. 347 with Holley Sniper & Hyperspark, TKO600, IRS, 245/40R18 & 315/30R18, DRL, Digital Guard Dog keyless Ignition Post Thanks / Like - 0 …. A back fire can destroy the power valve unless the carb has"power valve blow-out protection". I think if they are installed right and Holley tech line is used there aren’t too many issues. Starts up great, (when cold) but when it's hot outside and the engine is around 195 I have a problem restarting it. Hooker headers, 850 Holley double pumper on a Edelbrock Tarantula intake, big cam, Turbo 400 with a 3500 stall converter, 4. O2 Sensor Mounting: The O2 needs to be mounted 6-8” after the merge in the header collector. We pulled the Sniper off and put an Edelbrock AVS2 on while I sent the Sniper back to Holley …. It turns out that this is a common problem with the Sniper EFI install on vehicles with a manual transmission. It did not backfire with the Preformer RPM but backfires pretty regular with the Torker II. I set my IAC to 7% (following the instructions from Holley) while the engine was at around 190°F. Fuel Injection System, Holley Sniper EFI, Self-Tuning, Black Throttle Body, up to 650 HP, Kit. Basically drill 4 holes right next to the existing ones. The open vent tube in the middle front of the carb rising above the primaries or choke stack. Remove pump rod from the throttle lever. My googling skills are limited, and I am not certain which model is what I need. Holley Sniper EFI Self-tuning Fuel Injection System Kit 600hp 550-511k. 1978 - 1996 Big Bronco - Holley Cruise Circuit Hesitation & Stumble - I have a Holly 670 carb on my stock 351m in my 79 Bronco. How to install the easy to use Sniper EFI Hyper Spark Ignition System. It felt like it was going to stall out at stop. 2020 "Working the throttle" at the carb won't tell you anything or mean anything because in that situation there's no load on the engine. if its a holley double pumper put 72 primary jets in it and 73 in the rear for a higher rated cam. I swapped that out today and it fired. A faulty sensor (or sensor circuit) will often cause, cold driveability and emission problems. Quick Checks Ignition Wire Lightning There are a couple of things that you can do that are relatively easy and might give you some solid leads on the problem. '65 Chev El Camino, Pro-Flo 4 4150 MPFI. It's all Holley and supposed to make for a seamless install where it all works well together. the more I read about the difference between these systems the more I am leaning toward the sniper. When the pump becomes faulty, the vehicle can experience hesitation during …. on Holley Sniper Wiring Diagram With 6al Box. Includes cellular foam "anti-slosh" baffle, which …. SBC350/Maybe 400HP @ crank, 700R4. Now, though, the jury's decision to let him live may …. Engine module on HEI inition was also … read more. 050 598/610 lsa112, 5200 stall, th350, sniper, 9" with 3:70's. There must be no stalling (usually from fuel-slosh, or floats that don't work well with severe vibration, or off-camber). Holley Super Sniper EFI Unboxing The #1 Cause of Fuel Pressure Problems. MSD wires and new Autolite plugs. stalling, surging, backfiring…. The Howell seems to be pretty popular but I couldn't find many reviews. If the engine is at 180 on a cool day it fires right up after driving it. You will bang your head trying to tune SD under those conditions the …. Check vacuum leaks first, then clean and tune that carb real good. This condition is known as ‘running rich. The big difference between the MSD 6AL/Pro Billet setup and the Hyperspark setup is the Hyperspark is designed to be used with the Holley Sniper EFI controller. 2 compression small tube header 1 5/8" x3"x18" made 380hp at 5500 flat torque from 3500 to 5500. At low levels RF interference will often reset the ECU so quickly that the engine will not stall. Stay up to date with the latest releases. Holley now offers a plug-and-play harness for the Gen-3 HEMI. This occurs when unused fuel is emitted …. Phone Numbers 423 Phone Numbers 423-315 Phone Numbers. The intake system must be timed correctly so that it can feed fuel and air to the spark plugs at a proper rate. So, this is what it takes to put a Sniper on a small-block Ford. I am pleased to hear that you are stopping the bleeding. After we installed this on the jeep we had a hard timing getting it to start. By can yaka arrow kill thanos Comments Off on holley sniper efi starting issues. At the same time I also installed the HyperSpark Coil #556-152, Ignition box #556-151 and Distributor #565-300 and for good measure I switched to a Holley in-tank fuel pump #12-130. Real backfiring means the engine is not properly timed and the fuel/air mix is getting a spark and ignition at the wrong time (when the intake valve is open). Making Sniper EFI the perfect choice for carburetor to marine fuel injection conversions! A Flame Arrestor is REQUIRED for marine installations, …. Specifically, delayed timing causes a backfire. The Holley Sniper system is good for 650 HP with a 1,200 HP system coming 1/17. NEW HOLLEY SNIPER EFI SELF-TUNING MASTER KIT,800 CFM,BLACK,4BBL,FUEL INJECTION CONVERSION 1 offer from $2,346. One thing I noticed is that with any partial throttle, the timing control readout shows the timing going to the "cruise" setting. com/parts/sne-565-300/ Bronkenn the rpms definitely jump around, even when idling. This is extremely easy for our vehicles, all that is needed is a factory Ford fuel pump hanger and an Aeromotive 11540 fuel pump. If the needle is defective, replace with a Holley …. I'd like to try and fix it myself rather than get it towed to the mechanic, does anyone have any experience with the Sniper EFI and the Hyperspark ignition system?. A few things to know before buying this. I had a post a few weeks ago about my Holley Sniper system running poorly once the weather got cold. I also feel like people are more apt to get online and complain than to say how great something is. 1) Bad throttle positioner or bad vacuum source to it. Using a 1/4” open-end wrench, turn the screw …. the vacuum gauge needs to be hooked up to the intake manifold. Learn EFI engine tuning online with easy to follow video tutorials!. Holley has a nice sorted out piece in the Sniper …. Observing the temperature on the 3. Once above 160 degrees, turn the idle speed screw so that the idle is about 50 RPM below your target idle speed set in step 1, above. Now, Holley may very well have the answer for those who have been longing for a bolt-on EFI system that works right out of the box. Sniper EFI Initial Startup and Troubleshooting. The resulting resistance can burn up fuel pumps, wiring and relays. I called a shop that was authorized. Dallas Performance has designed, installed and tested supercharger systems for performance cars from nearly all manufacturers. She usually idles around 1150 rpms. Most carburetors use a piston or diaphragm type pump. For the first year and half, everything ran great. We sent the sniper back and got another one and had the same issue. Holley 3310 - 4160, vac secondaries New 350, No start or hard starting – hot or cold (2) Rough engine idle and stalling …. If the system is currently controlling timing, shut that off and run a distributor that is known good while you sort this out. Some are taper cut and may spill fuel at heavy inclines …. Still having bog issues with even light throttle now. Holley Sniper Electronic Fuel Injection Tec…. Engine A Dying CJ5! Hey Guys, This has been going on for a few weeks now, so sorry for the long story. You guys may know how to fix this, but I didn't so, I called Holley Tech. Holley sniper stalling at idle Holley sniper stalling at idle. I've read a lot of posts on the Holley sniper …. For other Ford Combinations, Intake Adapters are available through Price Motorsports to fit a variety of combinations. Hello, I am planning on installing an EFI and have a number of questions about it. P:F, Air Materiel Command Westinghouse Electric Nat. Holley EFI Holley Dominator EFI Dominator ECU. 703-384-6665 Grishilde Schairer. I have been having some issues with my CJ7 with the i258 running the Sniper Holley EFI 2BBl BBD. Even after I got it running after I let it run for awhile, it would lose power going down the road and seem like the throttle was pulling back. I’ve had my Sniper in for a couple weeks and The car has been running very poorlybackfiring, stumbling. 2) Drop the Primary jets back to 72's (yep that's right leaner!) 3) Bump the Secondary jets up to 77's. An adapter harness is available to connect this distributor directly to the Sniper EFI throttle body. Hand-choke the carburetor by putting your hand over …. It needs the tip pointed down at least 10 …. 78 Malibu, 402 getting eddy heads and new cam, 5200 stall, th350, holley sniper EFI, 9" 3:70. Not too familiar with the Holley 1904, but the 2100 carb was used with a loadamatic dist. I thought Holley Sniper had that readout on the screen, but I didn't see it. They flow large amounts of air and fuel, as 1,050-, 1,150-, and 1,250-cfm models are …. Car runs so much better, except it backfires of more like pops a ton. 12 Replies 1525 Views July 24, 2018, 02:13:27 PM by Strawdawg : Holley sniper …. The Sniper EFI broadcasts data channels to the Holley …. With more than 1,200 attorneys in 23 U. Atv Backfiring Through Carb. This solution is great for those that may have noticed a. He went 22-45 in parts of five big-league seasons …. See full list on efisystempro. Deceleration On Backfiring Harley. Like with the Sniper, the white Points Output wire is used to ground the coil through either the Holley Coil Driver Module (PN 556-150) or a capacitive ignition box (like the HyperSpark or MSD 6EFI) and distributed using the Holley HyperSpark Disstributor or Holley Dual-Sync Distributor. Engine starts, idles, and runs flawlessly. For best results, use the optional Dual-Sync Distributor to Sniper …. A defective fuel pump is a frequent cause of sudden car stall and hard start and restart. What that means is the engine cycle of fuel-compression-ignition-exhaust in the top end (cylinder head) isn’t in sync with the bottom end (cylinder block). This won’t cause cold stalling…. Bogging down, stalling out and backfiring at 2500 RPM when up to operating temp. I installed sniper on a fairly stock 350 about 2 years ago. Definitely wins in the looks and bling. And, obviously, with the vehicle standing nearly on the rear crossmember, the engine must still do 500-1200 rpm, with some throttle applied, REAL well, and WITH NO STALLING…. Set Timing a10* and she spits sputters …. Backfiring through the exhaust is a result of problems arising out of rich fuel mixture and out-of-turn sparking of spark plugs. The amazing HydraMat® is Holley's patent pending design that solves the problems associated with traditional fuel pick-ups in stock fuel tanks as well as …. Sniper and Holley Fuel pump wiring issue. It seem you got the idle and cruise surge cleared up and these are both usually mixture related issues. Stalling signs may be obstructed or disabled by the fuel pump of your vehicle. Intermittent Carburetor Backfiring on Both Sides: Okay…. set your squirter cam back to the original position. Displaying 421-480 of 1039 Products. RPM going up and down , miss firing and backfiring. That converter should make stalling less of an issue, not more. For whatever it's worth, in my Sniper installation, the MSD coil is on the front of the passenger side shock tower. Although there appears to be an option for fuel pressure readout on the Sniper screen, there is not. The timing is set at 15° at idle (checked with a timing light). I can drive it @ 5 miles, then the battery volts drop from 14V to 12-13 volts. in 2nd gear if I give it throttle it backfires up though the carb. Powering the Sniper, There are three wires that need to be connected to power on the Sniper, Red and Black main power wires, these need to be run directly to the battery and have a solid connection. Engine RPM – This gauge should show “Stall!”, once you begin cranking the engine it will show actual engine RPM, cranking RPM must be a minimum of 100 RPM. This causes the ignition cycle to begin late in the combustion chamber and ignite the fuel as the. Powering the Sniper, There are three wires that need to be connected to power on the Sniper, Red and Black main …. holley sniper efi starting issues Mobiles Reviews - Find the latest Mobiles News, Best Smartphones of 2022 Latest Mobile Phone Price in …. was on my K5 wheeler until 2014 with zero issues. I have the throttle on the mat (100% TPS) when I experience the bog around 3200 - 3500 RPM. 9 air/ fuel ratio and be loading up so bad your eyes water, And hardly ever starts without 30 seconds of cranking, backfiring, cranking. Sniper EFI Software Setup: System Parameters > Ignition > Select Ignition Type of “Sniper Distributor” from the drop-down menu. Sniper EFI is recommended, fuel pressure needs to be between 55-65 PSI. Im not stomping the brake peddle but ill ease on the brake and slowly increase pressure just like I would for casual driving/braking. Holley carbs run on the idle circuit up to about 2000 RPM at light throttle. Found out that it was due to rfi/emi. Your ignition timing, on the other hand, can be throw off by any number of little things. That kind of goes against conventional wisdom that input and return need to be the same, but remember that old 60's hemi's ran on 5/16 fuel lines. I have a 2002 Dodge Ram 1500 with the 5. If you come across this problem, replace the hose with a new one. Been daily driving and tuning a 69 with Sniper about 4 months, still couldn't get it to not stall in certain conditions with cold engine. Find Holley Sniper 550-552 Holley Sniper EFI Autolite 1100 Fuel Injection Systems and get Free Shipping on Orders Over $99 at Summit Racing! Holley Sniper …. The car is still on jack stands so it has not been driven. The movement had stalled, they say, because Mr. It's a stock bottom end with '65 289 heads, an aluminum factory Ford 4 barrel intake and a Holley 600 CFM vacuum secondary carb. Once you have gone through all 10 of these EFI Tech Tips, if you are still having problems, only then should you reach out to the Holley Sniper …. I use a 470 Holley Truck Avenger and it works great on the street. The first negative effect that we’ll be looking at is that it can thin out your oil. 7L Mercruiser Engine Bogging and Backfiring. I believe 10° is too retarded as after 30 seconds of running, I started getting slight stall and a good flamed backfire from the exhaust. Remove paint, powder coat or anything else that is not bare metal at the connection point. As far as I know, the motor is the original motor and was rebuilt back in the early 2000s. Well I must of done something right,,, free carb, about $300 for the intake. I have an issue that has reared its ugly head with my FiTech system. Now I could remove the Mechanical Pump and add the Block-Off Plate. Misfire Holley Sniper Efi. As for the return line, RobbMc says a 1/4" is good unless you're doing extended periods at WOT. but the tune was never right because i parted ways with the …. If the number is a whole number, then use the next lower power valve size. Engine Coolant Temperature (ECT) Sensor. Increases volume on Holley® carbs by 40% to eliminate fuel starvation problems. The new kit contains an F-2 ProCharger with CNC machined bracket and 50mm cog drive setup designed by Dallas …. If the needle is defective, replace with a Holley matched set. If you got a new HEI with the weights and vacuum go ahead and install it and the Sniper set to do fuel only. Hi, I've just installed a Holley sniper efi controlling timing using msd pro billet distributor and 6al. if you had to keep the choke on most of the time when riding it, your carburetor is seriously out of adjustment. One engine only will get to 1900 RPM and then starts to bark fire. There's a much better 4 hole spacer available: Amazon. This externally mounted Holley …. Good carburetor for a hot rodded 454. First, check the usual suspects: Make sure the cooling system has enough fluid. Hardware is good, but support is not for anyone that lacks patience or gets frustrated easily. Tuning is the part that takes time, knowledge and experience especially getting it to run right in cold weather and with cold engine. Thanks all for any help! Backfire vs. 1965 conversion - 67 gt350 Engine/DT - Sniper …. Coupe 0652-408W/510 hp-TKO600. This is especially noticeable at tip-in or low throttle input, such as when you are leaving a stoplight. I had mine installed by someone else. When I pressed for more details the owner stated he, and others, believe a stuck injector was the culprit. Engine Skipping rough idle, loss of power 14 Answers. Holley Sniper EFI is a perfect match for any muscle car, classic truck, street rod, or nearly any other carbureted vehicle. external regulator, which you have the option to do this with sniper or super sniper. Started all good, timing is good then when I lower the Cobra oval air cleaner base the sniper cuts out and resets and the base only needs to get within 2" from the top of the sniper. Wanted to see if anyone is running a Holley Terminator EFI or Sniper EFI setup on a high RPM (up to 7500) NA 347 or 363 with carb intake manifold and what your experience with the system has been. I just replaced the performer RPM with a single plane Torker II. Some settings that might help you with the stalling. Pay attention the to temperature gauge while driving. swap is a way better choice I …. It only happens when I drive it a few min. 87 Grand Wagoneer Rebuilt 360 by S&J, Fitech GO EFI 600, Novak in-tank fuel pump, Skyjacker Hydro 4" lift, BFG AT KO2 30", Dynamax Muffler, …. It commonly occurs when a car has been idling or has been turned off and then back on. Sniper Backfiring with new intake. The Holley leaks, and spits and sputters, so I’m thinking an Edelbrock is the easy fix. Backfiring during acceleration can also be caused by internal carburetor problems, low compression, leaks in the fuel tank, lean engine conditions, and weak or broken valve springs. Vintage Edelbrock C3b Intake Manifold Chevy Gmc Truck Sbc 265-400 Holley …. Plan is to change my Taylor spark plug wires to a Holley Street Fire set for now. The Ford hanger and Aeromotive pump were $207, had I known the in-tank route would be so. Some of the options for just getting reliable feed from a stock tank are also very expensive, like the Holley …. If your fuel pump is going out or your fuel filter is clogged up your fuel pump may not be able to send enough fuel into the air intake of your engine cylinder. 1996 GMC Z71 this happen all at once engine is misfiring, rough idle, loss of power, will start right up, check …. Builds My Holley Sniper EFI kit install into my 1978 FJ40 Basically got progressively worse with backfiring, loss of power, and crappy performance. Solving Holley Sniper High Idle Issues - EFI S…. I have an 87 K5 Blazer with the 5. I'm going to try and follow along with Gr8dain's results. A straight-forward setup process is detailed in the full installation manual. I have fixed a lot of these type issues and it is usually a combination of the correct cam and shooter size. 5" display started jumping around to different screens like it was shorting out I sent Holley an Tech request question and their response was a simple what is. You have to adjust the throttle plate screw to match the 750 chosen RPM to get the IAC between 2-10 after it warms to at least …. Idle control opens about 40% at cold start …. Never had a terrible bog, but did notice it if I had the vacuum on the other side. Use an awl to scratch the staking off, then flick the piston with your finger until it pops out of the hole. The Teflon that Holley uses to seal and properly clearance the blower will generally make noise while it is breaking in. A friend said possible grounding issue.