If your thinking about going the progressive route keep in mind you have to tell the software you are doing so and what the percentage is. There is another instruction that is dedicated to Troubleshooting High Idle Conditions in the Sniper EFI System. It'll be available in either a black or shiny finish, a 4 injector throttle body good for up to 600hp and a 8 injector tb that one good for up to 1,200 . Holley is released their new Sniper EFI system that is exciting for several reasons. High flow throttle bodies meant for power! This is great power from a . One of the units is the controller and the other unit only contains injectors. The Holley sniper would need to have the same arrangement. If there's any run time on your current setup the Sniper may have some bad learn data due to what appears to be timing issues. The Holley part number is 20-122. Supporter 2019. 7. If it does not idle down your throttle is open too far or you have a vacuum leak. MSRP of $749. newbie holley efi problems Good day to all. The learn function will offset the base fuel table until the closed-loop compensation only requires minimal changes. He said people only report their problems on the internet and not their success. Apr 13, 2017. It's economically priced so you can have all the benefits of EFI and still have . Holley recommends a 3/8" fuel supply line. Available in Polished, Classic Gold and Hard Core Gray™ finishes. The problem was with the Terminator TBI unit, Not the Sniper or the FiTech units. Included in the . Holley Sniper EFI self-tuning fuel injection systems from Holley deliver all the benefits—and none of the hassles. Fuel Injection System, Holley Sniper EFI, Self-Tuning, Black Throttle Body, up to 650 HP, Kit. I initially purchased a TV cable corrector and when I overlayed it on the throttle arm . If you have a car with 250 HP to 650 HP engine power, Holley Sniper EFI is always worthy of your investment. I have a 351 marine engine and what's happening is when I push on the throttle and quickly let off it will stall or want to stall. Taking off the RPMs climb really quick before clutch engages so you either squawk or take off quickly, shifting has to be done quickly as well, or RPMs drop. The four-injector module is compatible with up to 650 HP engines. Any help is appreciated. Recently installed a holley sniper efi system on my 67 6cyl easy install and system setup with the handheld. 1376. Hopefully the issues are resolved.25% OFF GODSPEED G. You can re-enable this after you have completed this idle speed adjustment process. Brand New Holley Sniper EFI Self-Tuning Master Kit, Black Ceramic Finish Holley Sniper 4 Barrel Fuel Injection Conversion - Self-Tuning Master Kit plus Handheld EFI Monitor (Part #550-511K) Holley just brought EFI within range, introducing Sniper EFI master kits! A full-featured throttle body EFI system that starts at only $999. This is done on my 1990 T. Mar 12, 2022. 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 160°. 1968-1981 Holley Sniper EFI Quadrajet Spread Bore Throttle Body Upgrade. You may have to register before you can post: click the register link above to proceed. Sniper EFI Throttle Body Harness Overview Figure 1 Before you get started - Are you experiencing any underlying problems? Only show this user. But are the benefits of electronic fuel injection worth the cost and effort of installation? 1969 Chevelle SS, zz454HO, Sniper EFI, Bowtie 200r4, 9" with 4.11's (money pit). Choose items to buy together. If it dies or drops more than 50-75 RPM the throttle is closed too far. Holley has brought EFI within range! Trouble-free performance with today's fuels - put an end to vapor lock and fuel varnish problems! FREE Shipping. It has been nothing but problems. Hit the key and it started right up. Hide details. Essentially, when I push the clutch in and ease on the brakes to coast up to a stop light, the AFR goes lean (18:1 or so) and the engine stalls. The Sniper EFI Throttle Lever Extension provides significantly decreased pedal effort and a smoother pedal feel. I did try the Second hole position but did not seem to change much. Recently installed a holley sniper efi system on my 67 6cyl easy install and system setup with the handheld. Replacement Idle Air Control (IAC) Motor for Sniper EFI 85/90/92/102mm Throttle Bodies and 90/95/105mm Holley EFI Throttle Bodies. I have recorded a data log. All you have to do is supply an EFI-capable fuel system, which Holley can help you with as well. Holley Sniper 550-512 - Holley Sniper EFI 1250 HP Super Sniper Fuel Injection Systems Fuel Injection System, Holley Super Sniper 1250 HP, 4150 Flange, Self-Tuning, Polished Throttle Body, Kit Part Number: SNE-550-512 Always try to fix mechanical issues with your car before installing an EFI system and always follow the instructions. . As I would slow down for a stop sign or stop light, the car would run really rough and the idle did not want to come down. Almost seems like it needs a spring to make it harder to push . Sniper EFI Tuning & Tech. I recently finished the full install of the sniper EFI system, sniper fuel tank w/ internal fuel pump along with the hyperspark ignition and timing. If so thoughts of performance and the setup . The Ford hanger and Aeromotive pump were $207, had I known the in-tank route would be so . Sniper EFI offers superior throttle response and wide-open throttle power. I will add my readings. Nov 4, 2020. This is extremely easy for our vehicles, all that is needed is a factory Ford fuel pump hanger and an Aeromotive 11540 fuel pump. As posted earlier you will need a fuel pump rated at delivering adequate pressure to the throttle body. 1. 2018 Toyota Tundra Limited Crew Max (DD and dog hauler) 2012 BMW 128i convertible (wife's) To start viewing messages, select the forum that you want to visit from the selection below. Last, the Snipers tend to not like low idle speeds so you may be pushing the limits. Holley Sniper EFI to the rescue! Sniper EFI Throttle Body 1 N/A 4150 Flange Sniper EFI Throttle Body Includes ECU, fuel injectors, Manifold Air Pressure (MAP) sensor, Throttle Position Sensor (TPS), Manifold Air Temp Sensor (MAT), and an Idle Air Control Valve (IAC) 5 Air Cleaner Gasket 1 9 3.5" Touch Screen Controller Using the throttle body's fuel pressure regulator will require a 5/16" fuel return line to the tank. I think a lot of the problems I was seeing were due to the previous owner running without . If they are Holley will not assist you with finding replacements. This item: Holley 20-16 Sniper Efi Throttle Lever Extension, Black. Only 17 left in stock - order soon. Part Number: SNE-550-511. There is another instruction that is dedicated to Troubleshooting High Idle Conditions in the Sniper EFI System. The throttle body has a built in fuel pressure regulator set at 58.5 psi. 1978 jeep cj 5 (amc 360 bored .060 over, 4" lift, 34" tsl's - project . It was at this point I made two mistakes. If you're having to give it some throttle it may mean that your settings are too rich or you IAC/idle screw are not adjusted properly. The Street/Strip and race cam setups tend to be too rich initially. Make sure you have full (100%) throttle travel. It turns out that this is a common problem with the Sniper EFI install on vehicles with a manual transmission. I am looking at the Sniper for my son's 1966 Mustang and in talking to Holley, most of the problems they are having are caused by people not following direction. This video shows you how to set the initial startup idle or if you want to reset your Holley Sniper EFI and reset the idle as well. $1,872. The throttle cable bracket from my carb would not work on the Sniper because the Sniper linkage sticks out further so I had to get a bracket fabbed, you can see where I needed the extra clearance on the bracket.. . If your engine races on start up you have a vacuum leak. Jan 7, 2019. See all 35 photos The Holley Sniper EFI system is a complete bolt-on EFI solution. So, I have a Holley Sniper EFI. Quick Fuel Mech Link Dp. I just finished installing a Holley Sniper EFI on my 65. 3 No Start Condition 4 Engine Runs Poorly at Operating Temp 5 Erratic Idle Condition 6 Incorrect Fuel Pressure 7 Magnetic Distributor Timing Control and bolts. You will find a lot of good information here; Forum: Sniper EFI Holley supports this forum and many users have Fords with a Sniper EFI. They want you to send the whole thing back to them to "service " it. Drive it, drive it, drive it! . First, "Wow, does this deliver some amazing power!" Then, about the time they get I've read most of the posts here about carb-to efi conversion kits and even though the majority of the posts were about the FiTech system, lately I've been contemplating the soon to be released on 06-15-2016 HOLLEY SNIPER EFI self-tuning kit. 4150 style 4BBL mounting flange - Bolts on in place of carburetor. Holley Performance highly recommends the following items be checked and/or corrected prior to installation of your new Sniper EFI system to ensure optimum performance from your engine. That is what we're looking for! This solution is great for those that may have noticed a stiffer throttle pedal after installing Sniper EFI. Engine dyno test of Holley's Sniper EFI conversion. This item: Holley Sniper EFI 550-871 Holley Sniper Stealth 4150 - Black Finish. There's a fair amount of noise on your battery signal so I'd probably start there. What else would Holley say. Oh, one last thing. Our Holley Sniper EFI Quadrajet "Throttle Body" is your remedy!The first bolt on spread bore electronic fuel injected throttle body . I had a blue wire coming out of the firewall that met this need, but it was already hooked-up to the + side of the coil and the Duraspark box. The Sniper EFI system looks at the closed-loop fuel compensation required to reach your target AFR. Caballero Joe. Jump to Latest Follow 1 - 8 of 8 Posts . The Holley regulates the fuel pressure on the return line port, if you regulate the fuel pressure before the Sniper you can plug the return line port on the Sniper. Engine started right up and ran great however on the first test drive about 3 miles from home it quit turned everything off about a min.started right up quit about 4 /5 times before I got back home. and bolts. I also put in new plugs and wires. 249. Single 100lb/hr injector for up to 175hp, integral fuel pressure regulator, and the ECU allows timing control. They put an end to carburetor cold start issues, hesitations, vapor lock, and flooding. Symptoms of RF Interference in Sniper ECU's The first thing to realize is that RF interference can manifest itself in ways that will have you suspecting and replacing everything in the system. As far as I can tell these are not off shelf parts. Burn that gas up and get busy installing your Sniper. Followed the instructions and did a couple of primes to fill the lines and such. Fits V8 engines from 250-600 horsepower. 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? Sniper Progressive Secondary Link--A Great Solution for Abrupt Throttle!When folks install their new Sniper 4150, Super Sniper 4150, or Sniper XFlow on their high-horsepower engine, usually there are two reactions. So, the issue I have had lately is a stall on deceleration when coming to a stop. Enhance your purchase. If you are using your Sniper EFI System to control timing, navigate to Tuning > Advanced > Advanced Idle > Idle Spark and ensure that the Idle Spark Enabled is set to Disabled. A 1 Inch spacer or a Single Plane Manifold fixed that. The Holley Sniper EFI 2300 is perfect for any vehicle that came standard with a 2300 Holley Flange like some Fairlanes, Galaxies, Falcons, Comets, F100s, Javelins, Rebels, Mustangs, Thunderbirds, Cougars and more. Raeford, NC. 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