But the failure tends to be deterministic, not random. I did the Holley distributor as well. http://www.youtube.com/user/CHUKImusic The most typical culprits are the spark plug and coil wires. I have a question. I am so thankful to have found this article on RF signal denial. Minor but has only just started after 3 weeks . Holley Sniper EFI FUEL INJECTION INSTALLATION MANUAL Read this manual before using this product. If you have "Magnetic" selected as your ignition type then you will see a place to set the MSV. That being the case, RFI/EMI will pass through the cap itself whether it has a hole in it or not. Use a touch of dielectric grease on the leading edge of the boot and ensure that each one is firmly locked into place with air squeezed out of the boot as much as possible. Holley sniper and msd Dave Martin 6.2K views 2 years ago All the different holley ecus compared devin vanderhoof What's Inside A Sniper Stealth Eric Weingartner Fixing Holley Sniper. I have been told that e-core coils tend to emit less RF energy than standard canister coils and I believe that to be true. Last summer, a faulty ECU in my Holley Sniper EFI took out my 1972 Ford Mustang, bringing it into early storage for winter. First, one must address why ignition charge is preferring to run down the side of the spark plug rather than arcing across the gap. But most of them can easily be shortened to a length that dramatically decreases their susceptibility to RFI. Where there are several options, opt for a conventional copper plug. Tony from the Holley forum thinks it might be the ECU.Thanks for any help. I've used this method for diagnosing misfires ever since! Copyright 2022 Holley Performance Products, Inc. All right reserved. But, if your symptoms persist then you need to consider that you may have an atypical RF source. Thank you Chris.Im currently fighting such a problem and its really frustrating. ive done dozens of these things and have one where air cleaner goes down bam she dies. The throttle body itself is generally fairly well grounded when bolted into place so, by extension, so are the air cleaner plates. Just want to take a moment to thank Chris for all of the assistance during the timing control set-up of my Sniper installation. Thank you very much for this article. Any advice? But the primary goal has to be the prevention of RFI. So, failing that, replacing the coil is a good way to test this theory. Solving RF Interference Issues in Sniper Installations. Rather, it is acting as a reflector, and grounding it doesn't seem to have much impact on that. Thanks. Provided I don't find any RFI then I'll increase the gap and make sure I don't have any problems. We will discuss tuning tips a bit later in this article. Gap the plugs to the manufacturer-recommended gap and if you are running big compression or boost you will have to either increase your ignition power or CLOSE the gap to compensate. Crank the engine and peak under the hood. This last section is only for those who are doing ECU-controlled ignition timing with their Sniper ECU. Full product line and accessories at excellent pricing. Copyright 2017 Cyberspace Automotive Performance, Inc. All Rights Reserved. https://www.dropbox.com/s/ljyuhb11gispark.zip?dl=0, If this is your first visit, be sure to Why? Managed to teach myself about the sd card and downloaded the firmware to the handheld successfully. On the other hand, low-powered signals (like the Wideband O2 sensor), signals that generate their own power (like the magnetic pickup in a distributor), and resistance-based sensors (like the Throttle Position Sensor) can be terribly corrupted by RF energy. Any information is GREATLY appreciated. All engine compartments have a bounty of sources for RF noise. I had my system installed by a local performance shop so I don't know where they picked up my master kit. 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. But the quality of their wire is unsurpassed. Privacy Policy. Stay tuned! When you're installing the Sniper, and until you have it running well, stick with copper and swap to a new set at the first hint of fouling. And before you put the plug wires back on, inspect the boots very carefully. In some cases, way too long. It must be actively driven and controlled by the ECU. Instead, if you are experiencing RFI then do yourself a favor and do a complete ignition tune-up: Spark Plugs (the exact plug specified by the manufacturer for your engine), spark plug wires, cap, and rotor. Start with the factory-recommended spark plug. ago Its in an 85 there isnt a map sensor, holley snipers take over completley. MSD 6AL. I may be eating the cost to rebuild a customers engine due to their system failure.. We taking a lot of my time and money to make this right. Doubt it? Just knowing that I'm helping folks is very rewarding! Pages of rants, most are probably newb install issues, but its not that hard to connect a few parts and an idiot proof keyed harness to a sealed ECU.so that makes at least a percentage of these hardware/firmware issues. Increased gaps increase spark resistance, causing energy to be emitted from the plug wires. You said there was metal in the oil how would that be caused by the injection? Many times I called Holley and ask why it wouldn't tune itself. Don't get crazy--if you set this too high then you will have troubles cranking the engine. Every time the alternator (3G) started to charge at 14.2V the timing would go crazy and the unit would hardly run. Great tips and advise. Author: Matthew D. Lunsford The ECU firmware is in with the software download (. The ONLY definitive clue is that the RFI goes away when the alternator is unhooked, but replacing the alternator does NOT change the issue. Once arcing occurs, carbon traces form on the outside of the plug and that provides an even better conduit for ignition energy. The Internet know-it-alls will tell you to open the gap up to get more power. This page was generated at 09:18 PM. Super informative, fast shipping, and so far a 5/5 experience! The AFR trace on all my data logs since February have looked the same, new install. what fixed the air cleaner issue. A great example of a wire that's way too long is the crank trigger pickup on the Sniper EFI System. This is a great time to visually inspect the overall Sniper EFI install. If that phasing is not precisely correct then this long arc is the source of a huge emission of RF energy. 12-10-2020, 03:06 PM. All times are GMT-6. WARNING! However, now that we have the Sniper back, it is time to get the car running again. I've got a huge bucket list trip coming up to the NCM in Bowling Green end of the month and I had some issues this past weekend. Problem is not the alternator. They told me I had RF problems that I failed to accept. When I start the car and try to rev the engine the TPS goes to 35% but no further. This is by far the best guide to EMI/RFI sources and troubleshooting Ive come across on the web. I swapped from a Edelbrock 750 and a Carter mechanical pump. Trust me, nothing would make me happier that to loose my **** at this point but im gonna keep it together for now what was in the filter? But here we see that the alternator was somehow indirectly responsible--that the true culprit seems to have been the old MSD box. To do this will require downloading the Holley Sniper Software. Got with Holley and the pointed me down the RFI rabbit hole. In early November I was having a problem starting my car with the Sniper. Im guessing this isnt normal and could be the primary cause of my problem? When you install them, it's a good idea to put a bit of dielectric grease on the inside of the boot on both ends of the plug wire as well. Before launching into the source of RF energy, it may be helpful to recognize those components of the Sniper EFI System that are most susceptible to RF energy. I"m going to gap down to 0.35 to 0.45. Right through their front window. Surprisingly, I've almost never found that to be the problem. They are a couple of bucks each, right? Parcel arrived today and I installed the repaired Sniper straight away. 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. He directed me to a few articles and I'm just about done with the set-up after getting what was most likely RF Interference issues sorted out. 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. However, now that we have the Sniper. Removed all the unused wires from harness and wrapped all the remaining wires and harness with rfi shielding tape. Other EFI Systems may require different terminals. Advanced throttle body injection systems capable of transmission control and more. I don't know anything specific to suggest other than what you read above. Terminator X Max 700R4 LS2 L92 heads and LS3 525hp cam and Jim Inglese 8 stack fuel injection. My only issue as present is some misfiring popping through the throttle body. While it was gone out I ordered the hyperspark ignition box from u and will be starting the set up and tuning shortly. For more information, please see our Copyright 2022 Holley Performance Products, Inc. All right reserved. Any other advice or ways i can further pin point the issue? I should note that I am running a 6.0 truck motor with the high driver side alternator, which happens to be very close to the TPS and IAC on the throttle body. In the 10-pin harness, the white wire will only be used if you are doing ignition timing control. Instead, I'd check the grounding of the alternator itself. 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? Copyright 2022 Holley Performance Products, Inc. All right reserved. At the end of my roper here so any help is appreciated. This page was generated at 09:18 PM. Price Point: $$, EFI Systems based on Holley's world-class Dominator and HP ECU's. Even if it acts properly when powered off you might want to just get a new TPS and try it. On a new-build I swapped over to the EFI sniper and dual sync distributor on a 383 big block Mopar with 810 Mi break in. The immediate result is shown in the trace below. I found my problem. check out the. Because they are easier to purchase than the Magnecor my favor is leaning in their direction. I called them to see what the next step is and I get the best news. Seems the Sniper should have a fail safe if it sees the rail pressure drop with an RPM (NONE) mismatch..Dont know how smart they are but that's a safety feature from high pressure pump EFI day 1: no CPS RPM detected, no fuel pump relay power after 2-3 seconds. I sincerely doubt that. That's because the ECU was seeing the same thing and flooding the engine because of the false RPM readings. In the dark I see spark from the nut on the spark plugs running to the head bolts. 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. One zone where there is nothing but ignition wires and another zone for power and signal wires. I tried this, but got a Bam1 error ECU firmware upgrade failed. But if you're fighting RFI then it's time to step up and do this. Problem gone. I have a similar problem with the sniper and hyperspark on a 68 Chrysler 300. It removes the oil from the bearings, now your metal on metal. The problem is that even the best wires don't last forever and all it takes is a crack in the insulation at a key point to create arcing. Same. If you had precise electrical measuring equipment it could be done but that is far beyond what almost anyone has. RF Interference is an unavoidable enemy to successful EFI operation so it must be carefully and thoughtfully managed. Bolt-on carburetor style EFI for your classic car or truck. Called Holley after checking everything. If you think your throttle position sensor is failing, working some of the time and other times it is registering negative percent, my first suspicion: RF Interference. Raw (liquid) fuel running through an engine is VERY bad. I don't know much about tuning but I'm getting frustrated, nobody has and ideas. But denying the problem won't get it solved. More wires that are potentially unneeded. Start by using an ohm meter and check the resistance between the alternator case and the block. 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. ECU failure mode - constant resetting. All times are GMT-6. Cookie Notice I have a holley sniper put in my big block and been screwing around trying to upgrade the firmware. It is simply amazing how much EMI an alternator can produce. Have you tried replacing the distributor's internal ignition module/magnetic pickup? You'll simply have to buy them direct if you're interested. Would having a hole drilled in my Cap for phasing be bad for emi/rfi ? If your distributor is old then recognize that it could be rotating in a non-concentric manner. I am experiencing a faulty TPS which may be due to RFI. Should I change my non restistor style spark plug to a resistor type. Shielding is really taking the wrong approach. Cope is it possible the regulator/ pump is going nuts and creating way too much pressure at times? Zanes Garage 4.71K subscribers Subscribe 13K views 3 years ago Tested my o2 sensors and determined the ECU on my Holley Sniper Efi. . I have checked and rechecked every ground i can think of and even added a couple more just to be sure. Thought I'd post this because of all the problems guys have with ECU problems. EFI System Pro had everything I needed for my EFI upgrade. Car runs perfect now!!!!! It will be necessary to find the source of the RFI and eliminate that. Free ground shipping regardless of order size! RPM going up and down , miss firing and backfiring. Thanks Chris for the feed back regarding my rough running sniper/timing issue even though I bought my sniper through Holley.
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