Yeah, the Sniper IAC can be fun to get right. They said the IAC jumping around some is normal. Are you experiencing random high idle with your Sniper EFI?Could be caused by the rear throttle plates pulling openHeres the fix! Also exhaust is replaced, no leaks. ENGINE VACUUM: Thinking it's around 13. The IAC, TPS, MAP are all integrated into the throttle body. Install the throttle linkage to the Sniper EFI throttle body. I have read on the holley forums they've had some problems with IACs on their other sniper units. Not the picture of efficiency when new. It felt like it was flooding out at low speed, low RPM. Sep 17, 2020. Its very common for the Holley Sniper to have coolant temperature sensor problems from the very beginning straight from the Holley factory. I went with all the Holley fuel pump and accessories and my car wouldn't even start. Everything is included to completely plumb your fuel system including; 20 feet of 3/8" EFI Hose, in-line fuel pump, post and pre fuel filters, return bulkhead, and all of the necessary fittings and hardware. 1bbl Holley Sniper EFI system. If disconnecting AIR it should be in there. Author: Matthew D. Lunsford Timing settings are 15 degrees at idle, 30 WOT, 32 cruise. Recently installed a holley sniper efi system on my 67 6cyl easy install and system setup with the handheld. 3. Find Holley Sniper EFI Stealth 4150 Fuel Injection Systems and get Free Shipping on Orders Over $99 at Summit Racing! Members Profile. IIRC with the GM TBI, you have to unplug the TPS/IAC, jump two pins at the diagnostic connector, adjust the idle stop screw, then shut down engine, reconnect everything, re-start, to reset the base idle speed. In Stock; Default; In Stock; . There was a problem filtering reviews right now. Option 1 is to purchase and install one of the Holley EFI Dual-Sync Distributors on your engine. Holley came out with the Sniper EFI 4150 not long ago, and it made quite a splash. In Stock. The IAC, TPS, MAP are all integrated into the throttle body. If you have a failure, you replace the entire throttle body. Use the idle speed screw to set the idle at a comfortable warm-up speed. If you do not understand a step, seek assistance. When the truck was getting fed through the Quadrajet, my highway mileage was 10.5 to 11.0 miles per gallon. Quantity: Sold as a kit. Extending wires with too small of a wire gauge will also result in the same damage. The problems start over after a few minutes of driving. Using the correct length carb stud and nuts, tighten the Sniper EFI throttle body down progressively in a "criss-cross" pattern (60-80 in.lbs.). The resulting resistance can burn up fuel pumps, wiring and relays. Double-Check Your Ground Triple-Check Your Ignition Inspect Your O2 Sensor Fuel Pump Location Idle Air Control Valve Hard Starting Issues Ignition Switch Wiring Strange Noises Read the Instructions #1 READ the instructions and Follow them. - Verify Wiring - ECU must be powered and grounded directly at the battery and the battery is fully . Does anyone use the second or third hole positions on . At least in these times. Ignition Harnesses. Switch the power to the Sniper off. Hopefully someone here with more experience can help me out. Holley Sniper EFI Stealth 4150 fuel injection systems feature four 100 lb.-hr. 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. We recommend at least a 3/8" feed line and 3/8" return line. Sep 24, 2019. Check Your Wiring #2 Wire it properly Most important! Please try again later. The Inductive Delay allows setting it to eliminate high rpm timing reading fluctuations. When the truck was getting fed through the Quadrajet, my highway mileage was 10.5 to 11.0 miles per gallon. 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. Timing is verified with a light, fuel pressure is good, idles well. This video shows the engine below and above operating temps and with and without the iac p. Had to get another unit. Only show this user. One thing I noticed is that with any partial throttle, the timing control readout shows the timing going to the "cruise" setting. The other down side is that it appears availability is a problem. Stay up to date with . This is a great time to visually inspect the overall Sniper EFI install. Even checked using the Holley's "static timing" feature that eliminates any ECU induced spark timing fluctuations. Sort. Holley EFI Fender Gripper $30.30 Part# 36-512 Overview Sniper EFI 85mm (3-bolt) Throttle Body Plus Spacer Plate Features: Cable Operated throttle Body with 85mm opening Enlarged bore allows increased airflow to support higher horsepower requirements Works great as option for factory 3-bolt manifolds High quality billet aluminum construction You can re-enable this after you have completed this idle speed adjustment process. Muncie M20. This is the original 1979 350ci small-block. IAC Motor Included: Yes . The Sniper needs a "clean" 12V wire that is hot in Start and Run. Doug F. said: You need to check your timing while running, and check phasing. Reactions: . . Perfect for street rods, muscle cars, off road trucks or nearly any carbureted vehicle. Jim CJ-2A - 81299 Greaser007 . The other down side is that it appears availability is a problem. My Bronco with Holley Sniper EFI was running poorly. Found out that it was due to rfi/emi. HyperSpark Ignition for Sniper EFI. Since the shield was put on, not a single problem, not one. I originally bought the Holley Sniper when they were very hard to get. sniper Installation If you're installing a Sniper EFI system and almost ready to crank it over for the first time, this is the video for you! eliminate the box to make sure its not your noise source, and go from there. . $75.77. 1963 Chevy II 400 - Pontiac OHC 230 - Powerglide - Holley Sniper. Muncie M20. The engine shouldn't stall when blocking off the IAC air inlet port (at hot idle). Billet Aluminum Black Sniper EFI Throttle Body. Holley Sniper How to Set The IAC Idle air Control in 5 minutes or less. Introducing the Holley High-Horsepower Super Sniper 4150 EFI. So, this is what it takes to put a Sniper on a small-block Ford. The Sniper Stealth 4150 ECU is capable of fuel map self-learning and ignition timing control, improving idle stability . . Holley Dual Sync Distributor Timing Control 199R11369 Date: 7-28-17 . Author: Matthew D. Lunsford You turned the key on, and one of the bowls filled completely up with fuel. I set the idle to 800RPM and it keeps jumping from 750RPM to 875RPM while idle. Set static timing at 10 degrees, moved distributor slightly so it would match, then hit Clear and Close, to exit that section. extremely rich mixture, which could cause drivability problems and severe engine damage. 540 BBC + 15psi Boost via Single Garrett GTX. Holley Sniper EFI First Start Up & Setting the IAC adjustmentIn the first video I showed you how to install the complete Holley sniper EFI sytem including th. On EFI systems such as Holley's Sniper, all of the EFI sensors (except for the O2 and coolant temperature sender) are mounted snuggly in the throttle body. Option 1 is to purchase and install one of the Holley EFI Dual-Sync Distributors on your engine. An adapter harness is available to connect this distributor directly to the Sniper EFI throttle body. also double check your rotor phasing before trying again. Holley sent us an MSD dual sync and mostly fixed the problem, but now randomly dies due to EMI. One workaround was to leave it in gear and slow to a stop and push the clutch as RPMs drop . Engine is almost new (bought 3 years ago). May 20, 2017 #56. That would require that the IAC be replaced. You've got it running and warmed up but now you . I did try the Second hole position but did not seem to change much. 4.5 out of 5 stars . This is the position the IAC motor will be at during cranking and immediately after the engine starts. no problem. Filter. If it is too high, . Members Profile. The wiring was a bit of a mess. 4150 Sniper EFI (550-510 Shiny, 550-511 Black, & 550-516 Gold) 2 . There are two ways to go here. 72 Chevelle Malibu. Featured Products Sniper EFI $5.78 - $440.95 470 Products author Staff Writer 927 Posts An Article About Video tech Sniper EFI Videos Sniper EFI Tech Sniper EFI sniper Installation This minimizes installation time and packages really well on a diverse group of engine applications. Not the picture of efficiency when new. Timing settings are 15 degrees at idle, 30 WOT, 32 cruise. Notes: Kit includes 4 injectors and can support up to 650 hp. Observing the temperature on the 3.5-inch handheld (only), wait for the temperature to achieve 160 degrees F. Once above 160 degrees, turn the idle speed screw so that the idle is about 50 RPM below your target idle speed . Holley 860005-1 Sniper EFI Throttle Body 102 mm. Idle Tuning is a very important part of tuning any EFI system, especially our self-learning units like Sniper or Terminator X EFI. Created a document which included all the spare parts (non-Holley, OEM) on the Holley Sniper EFI Owners Group on FB before I was banned (by Facebook). Two months fighting, cursing, not getting any help from Holley OR the forum, and a stupid little tin plate. CJ2A #29110 "General Willys" MB #204827 "BAM . I have been having some issues with my CJ7 with the i258 running the Sniper Holley EFI 2BBl BBD. (MAT), and an Idle Air Control Valve (IAC) 5 Air Cleaner Gasket 1 9 3.5" Touch . Holley EFI Idle Air Control (Iac) Valve Motor. Please try again later. CAM SETTING (Stock/Mild | Street/Strip | Race) AND YOUR CAM SPECS: Stock/Mild settings. 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. I called Holley support. Getting the throttle blades and IAC to work together will keep your fuel injected hot rod running smooth and predictable. Jim CJ-2A - 81299 Greaser007 . After installing the Sniper and running for a few weeks with the initial air/fuel settings as mentioned, I saw roughly 1 to two-miles per gallon increase. If I attempt to adjust the idle screw toward 2%, the RPM will run away high, then slowly come back, but it won't come back to desired hot idle. Jun 14, 2021. I absolutely love it. . Apr 22, 2020. I've updated the firmware to it's latest version, start all over with default settings and the problem still exists. Buy NEW HOLLEY SNIPER EFI SELF-TUNING KIT,800 CFM,BLACK,4BBL,FUEL INJECTION CONVERSION: . Newest; Items 1 - 1 of 1 Items. Buy Holley 860005-1 Sniper EFI Throttle Body 102 mm. Engine running at various rpm's, and compared/sync'ed ECU read timing to balancer. It's economically priced so you can have all the benefits of EFI and still have money to finish or upgrade the rest of your ride! Mar 18, 2019 . If you datalog the Sniper ECU and see multiple overlapping traces for the same signal, you likely have RF-induced problems. if not call holley or the jokers that sold you the unit. The IAC reads about 9% when idling in Park (instructions say it should read between 2 . After discussing it in this thread and talking with Holley's tech support, I decided . jesse. If you have a failure, you replace the entire throttle body. The IAC setting is at 4% and TPS 0% and the enginge idles at 750 RPM. The engine now idles right where it should (have it set at 750 RPM.) Mainly the idle will not stay level. I am planning on removing all fuel lines (5/16") anyway and replace it with a 3/8" tube. The Sniper EFI master kit contains the most complete EFI fuel system on the market. fuel inlet must go to one of the three options for the inlet fitting on the 4150 Sniper EFI. . Ignition and Electrical Components . holley sniper efi Throttle Position Sensor $36.61 Part# 870001 Replacement Idle Air Control (IAC) Motor for Sniper EFI TBI Systems, Sniper 90/92/102mm Throttle Bodies, Terminator TBI, Avenger 4bbl TBI, HP 4bbl TBI, Commander 950 & Digital Pro-Jection Systems. There are two ways to go here. So you installed your Holley Sniper. Nov 27, 2016. #24. Here I am 3 years later still having problems. 78 Malibu, 402 B&M 174, eddy heads, 232/ 236@.050 598/610 lsa112, 5200 stall, th350, sniper, 9" with 3:70's. 26 X 8.50-15 M/T slicks. Comp Cam 280/494. CJ2A #29110 "General Willys" MB #204827 "BAM . Buy Holley EFI Idle Air Control (Iac) Valve Motor: . After a re-start, the TPS/IAC re-set. Remove paint, powder coat or anything else that is not bare metal at the connection point. - Verify Wiring - ECU must be powered and grounded directly at the battery and the battery is fully . The Sniper EFI System comes with a built in fuel pressure regulator, factory set at 58.5psi. Switch power to the Sniper on and crank the engine. If the IAC is large-ish, blocking the IAC air inlet will cause the car to stall (at idle). New IAC and TPS did not fix the problem. It also had indentations from the old carb that didn't match the Sniper base. Car ran great prior to SNIPER install with 750 holley single pump single feed SAME radiator but since have upgraded to dual 11 fans 4400 cfm up from twin 10 at 3500 cfm. This morning I installed a new 1/2" spacer with fresh gaskets. IAC COUNTS @ idle and cruise. Idle Air Control Valve. You can unlock the sophisticated features inside the Sniper by merely popping the SD card out of the hand-held and plugging it into a laptop or desktop computer. A straight-forward setup process is detailed in the full installation manual. I decided it was the IAC by taping off the IAC port on top of the TB, (Which makes it NOT work), and turn up the idle screw to open the blades oh so slightly. Holley Sniper EFI self-tuning fuel injection systems deliver all the benefitsand none of the hassles. Free shipping on orders over $100 - Details I am having a couple issues. My OHC Build Thread. check tps/Throttle blade postion and IAC positions. Billet Aluminum Black Sniper EFI Throttle Body: . Put an end to cold start issues, hesitations, vapor . 1970 F100 SBF motor EMI problem from Sniper distributor. My system inevitably had an ECU failure in under 500-miles, and the car was towed home twice during that time period. Sniper EFI Idle Tuning. Holley's Sniper line of self-learning throttle-body EFI systems has been a value/performance breakthrough, and its new line of Super Snipers takes functionality up a notch. This is the original 1979 350ci small-block. EFI . 350. 2. The Sniper EFI master kit contains the most complete EFI fuel system on the market. It felt like it was going to stall out at stop. Car has run perfect every time and has never hesitated or stalled since. I have a Blueprint 347 engine with Holley Sniper EFI and F5 gas pedal, throttle cable on the top hole position and I'm finding it a bit sensitive, almost like and on/off switch. There was a problem adding this item to Cart.
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