holley sniper ecu failure
If this is your first visit, be sure to I've always thought that Sniper resetting was due to wiring or RFI noise, but today we proved that wrong. Any other advice or ways i can further pin point the issue? In the case of our Project Shop Truck with cast iron Vortec heads, GM recommends the ACDelco R44LTS6 gapped at 0.060 inches.On the point of gap I'm going to rebel a bit for the initial start-up. I would absolutely recommend replacing that. Just knowing that I'm helping folks is very rewarding! Copyright 2022 Holley Performance Products, Inc. All right reserved. See the spikes on the brown fuel trace? Ensure the Crank Signal Positive / Negative wires (Purple and Green) are twisted snugly together the entire length of their run. Pricing was reasonable, shipping was prompt and Chris helped me with a wiring question during my install. Where you do pass these high-voltage wires ensure that the wires are running at 90 degree crossing angles--never run in parallel. It suffers from rfi. I used the tip of checking for arcing in the dark and bingo I can see white light between the epoxy-sealed body and metal casing on my MSD HVC Blaster coil. Price Point: $$, EFI Systems based on Holley's world-class Dominator and HP ECU's. If you don't see any lightning under the hood, you might use a wooden dowel to move the spark plug and coil wires around just to be sure the problem isn't a dynamic one with the motion of the vehicle or underhood air currents.. So, a second quick check is to disable the alternator (preferrably by removing the belt). I called them to see what the next step is and I get the best news. Free ground shipping regardless of order size! (Yes, connect the power and ground directly to the battery!). What is the engine? Im running msd street fire wire set. How did you fix the problem? Raw (liquid) fuel running through an engine is VERY bad. Start by using an ohm meter and check the resistance between the alternator case and the block. So, failing that, replacing the coil is a good way to test this theory. The ONLY definitive clue is that the RFI goes away when the alternator is unhooked, but replacing the alternator does NOT change the issue. In early November I was having a problem starting my car with the Sniper. So don't waste any more time on that. All times are GMT-6. A few years back my friend built a 40 Merc with a 540 twin blowers and Holley FI and he had a 4 speed Lenco, and every time he would shift gears it would back fire and blow the belt off. Where there are several options, opt for a conventional copper plug. Found out that it was due to rfi/emi. Find a lower price anywhere and we'll beat it by 5%! The pin removal tool mentioned in the section above can be used to remove these pins from the 7-pin connector on the Sniper main harness. An ungrounded plate tends to reflect it-- sometimes right down into the ECU. A grounded plate tends to absorb RFI into the ground plane. Don't get crazy--if you set this too high then you will have troubles cranking the engine. When you are inspecting/installing your cap and rotor, pay particular attention to the tab on top of the rotor and the button in the center of the cap. Others have had success by actually improving the ground of the air cleaner plate by adding a grounding strap. #1 Sniper Setup Wizard Failure Fix 06-20-2018, 01:26 PM I'm finding that several Sniper EFI Systems customers are getting to the end of their Setup Wizard process and getting a message that says that the file necessary to complete the configuration can't be found. This motor got brand new everything except wiring harness/fuse panel; new Powermaster alternator, PerTronix Flamethrower Distributork, plugs, and wires. If you pick up soot then you've got arcing, and that's not good. Let's see how long it'll take from Memphis, TN over to Bowling Green, KY. Yep, same situation around here. Cheers. Then it quits. It never hurts to try but we've seen very limited success from grounding the air cleaner base plate. Ground different components direct to the battery. Personally, I have had the best experience with Magnecor wires. Surprisingly, I've almost never found that to be the problem. Once arcing occurs, carbon traces form on the outside of the plug and that provides an even better conduit for ignition energy. If you don't have "Magnetic" selected as you rignition type then none of this applies to you. Since swapping the alternator didnt fix the issue we put the original (but still new) alternator back on the car. ago Its in an 85 there isnt a map sensor, holley snipers take over completley. P/n6420 Get your engine running RFI-free and then you can play with increasing the gap if you'd like. But there have been such gains in technology on these CD boxes over the last few years that anyone with a box more than about 10 years old really needs to consider replacing it before it leaves them stranded. He said Holley said it will work and they have thousand out there to prove it. Holley Sniper failed ECU - YouTube All rights reserved. 14.7 target AFR jumps to 16.4+. It removes the oil from the bearings, now your metal on metal. This despite having a quality brand of plug and coil wires that were well-routed. RF Interference is an unavoidable enemy to successful EFI operation so it must be carefully and thoughtfully managed. With alternator unhooked there is no issue. Sniper ECU and Handheld Firmware Versions, http://forums.holley.com/showthread.2193#post72193, If this is your first visit, be sure to And when you do it can seem like nothing is working right. The problem is that the base plate is not conducting the RFI. Great things are achieved through persistence. As a last resort, I'd try reflashing the ECU firmware. Privacy Policy. I have had others with similar "alternator-related" problems that never got it solved, even after changing the alternator multiple times and cleaning every connection. Super Sniper or Sniper XFlow? If you have done the steps above then you likely will never have any problem with RF interference. If these are sooted up then you might have found part of your problem. In fact, the magnetic pickup is so susceptible that I recommend using a hall effect sensor (such as in the Holley HyperSpark Distributor) when practical. No spark/ECU failure/out of warranty. - Holley Performance Products Forums Increased gaps increase spark resistance, causing energy to be emitted from the plug wires. In a non-ECU controlled ignition setup, such phasing is done automatically. Hope this helped someone in the future I found my problem. Good find! After letting her cool down a bit, she started beautifully, only to die again. The mechanical and vacuum advance mechanisms within the distributor physically advance the spinning rotor so that it is in precise position to deliver the spark at the desired advance. You are using an out of date browser. . Alongside getting the car to run, we decided to make the wiring around my RobbMC Surge Tank a lot cleaner for a show-ready installation!#HolleySniperMustang #DailyDrivenMuscle #MuscleCarVlogSongs:Twenty Three - TaurtolloLife - Instrumental Produced by Chuki. All times are GMT-6. Not a bad idea and definitely worth a try but so much of this is trial and error. 12-10-2020, 03:06 PM. Failure to follow the instructions may result in Even if theres a downstream problem which needs fixing, sure the coil shouldnt be arcing from what appears to be from the side of its body? The coil is similarly mounted to put the coil wire in this zone. If the oil thinned, perhaps it didnt do any damage as you only had it running a low RPM for what maybe 5-6 minutes? It appears to be on most of the plugs. Great job, Dewayne. It just doesn't happen to conentrate enough RFI to create the instant ECU-stopping effects you see until the air cleaner is in place. Have tuner now still runs very rich, have to run open loop to get home, runs pretty good. I have a 1970 el camino with a 350 sbc msd 6al and blaster coil with msd leads. what fixed the air cleaner issue. I have a similar problem with the sniper and hyperspark on a 68 Chrysler 300. Same. Dont buy your EFI anywhere else. I also believe you can contact Holley for troubleshooting as well. It will be necessary to find the source of the RFI and eliminate that. Another thing that every installer should do is remove all wires that aren't being used. But most of them can easily be shortened to a length that dramatically decreases their susceptibility to RFI. This Crimping Tool is available with the Delphi 12048074 Metri Pack 150 Series Female Terminals that you'll need to reterminate after you shorten the wires. Normally, powered sensors are not bothered by RF impulses. Under "System Parameters" is a section called "Engine Parameters" and a section called, "Ignition". Car runs perfect now!!!!! I look at the data log and noted that every time the engine got to 184 degrees it lit up with RFI. Im guessing this isnt normal and could be the primary cause of my problem? I wasn't going to mention this because it's probably not the problem. Fuel Injection technical support Home / Support / Fuel Injection Sniper EFI HP and Dominator EFI Holley EFI Displays Terminator X and X Max Atomic 2 Hilborn EFI and MFI Terminator EFI Avenger EFI Pro Jection and Commander 950 Holley EFI V6 Holley EFI V6 Software - Build 300 Holley EFI V6 Software Build 300 Installer. That being the case, RFI/EMI will pass through the cap itself whether it has a hole in it or not. So he did. What is best course of action? The problem is with his set up he will be cruising at 3000 RPM and grab the next gear and put a load on the motor without giving it more fuel IE stepping on the gas pedal, so it leans out and back fires and that brakes the blower belt. Reddit, Inc. 2023. - Verify Wiring - ECU must be powered and grounded directly at the battery and the battery is fully charged. Based on those I've helped it appears that a few Sniper EFI Systems are shipping with ECU firmware version 1.0.17. Getting what I think is false lean readings. Listen to what the technicians tell you. It's being installed by a performance shop and the mechanic says the car starts and runs fine, until the air cleaner is installed. And finding the problem often is easier than you might think. Another action I have heard of people taking is replacing the 1/4-20 air cleaner stud with one made of a non-conductive plastic like nylon or delrin. All times are GMT-6. Second unit would be going back. Yes, doing this means that you will need to cut wire from a fully terminated harness. You said there was metal in the oil how would that be caused by the injection? They're sending me a new Sniper free of charge, plus free shipping back to Canada. We took a known good alternator and bolted it onto the Pontiac but the issues unchanged. Not that your TPS can't fail. Thanks so much for the positive comments. Nice job! Went to back the car out of the shop one day and it would not idle for anything. Newer alternators, (such as the Ford 3G, 4G/GM CS130, CS144), are able to produce near-full current at idle speeds plus they are so much more electrically quiet. Generally, that is bad advice. That is understandable, because there may be absolutely no other indication. They are a couple of bucks each, right? You may know that old-school alternators (such as the Ford 1G, 2G/GM 10SI, 12SI, etc) do not support high current draw at idle. I worked for Cadillac for ten years and I know how fuel injection works, that said, I kept telling him the set up would not work because it only uses a TPS and MAP for fuel delivery. That arcing will result in EMI. Same. ive done dozens of these things and have one where air cleaner goes down bam she dies. If you have "Magnetic" selected as your ignition type then you will see a place to set the MSV. Connect the msd to a separate battery. Holley sniper EFI error 33 and what does it mean? How would the bad sniper cause damage to the internals of the engine? I have a question. The first thing you should do when you suspect that you have RF interference is to double-down on all of the best practices that are given in the installation manual regarding wiring. This is the second sniper unit to fail on me in 3 months. But since the factory can't know how long wires you might need they tend to make them too long. Last ditch effort, i sent the entire unit back to Holley for testing. The immediate result is shown in the trace below. But here we see that the alternator was somehow indirectly responsible--that the true culprit seems to have been the old MSD box. You can take them back if you don't use them. My only issue as present is some misfiring popping through the throttle body. Buy two or three sets. Many, many years ago I discovered the "lightning storm" mentioned in the article. Try a completely different style of alternator. Cleaned all the plugs and it seemed fine. In this first picture you see a quick blip of the throttle (light green trace) and the resulting increase in RPM. Thought I'd post this because of all the problems guys have with ECU problems. and our I offer this troubleshooting guide to give you some of the symptoms of RF interference, common targets and sources, and then tips for solving it. And just as it stalls you look down and see a TPS reading of -22%, that's a pretty good clue. But I wanted to know if grounding the cleaner might solve the problem? In the dark I see spark from the nut on the spark plugs running to the head bolts. ECU-controlled timing would conflict with these mechanical advances, so they are locked out (in the case of the MSD distributor) or are non-existent (in the case of the Holley Dual-Sync and HyperSpark Distributors.) Solving RF Interference Issues in Sniper Installations. Turns out he did. Just want to take a moment to thank Chris for all of the assistance during the timing control set-up of my Sniper installation. But the failure tends to be deterministic, not random. Very rare but when that happens you need to stop feeding it O2 sensors at maybe number 3 or 4 (not number 7) and send the unit back to be checked. This page was generated at 09:18 PM. But you aren't the only one seeing that. This last section is only for those who are doing ECU-controlled ignition timing with their Sniper ECU. Two months later I get an email saying my ECU was definitely toast.
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