Thanks so much for taking the time to tell us about your problem and solution. Holley Sniper EFI These wires are necessary so they can't be removed like the spare wires mentioned above. And just because you increase your ignition power that doesn't mean open the gap. 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. However, now that we have the Sniper. 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. Use a clean white cloth and wipe inside of the cap. Called Holley after checking everything. Let's see how long it'll take from Memphis, TN over to Bowling Green, KY. Yep, same situation around here. Been through seven 02 sensors and seven or eight sets of plugs. The setup wizard offers three cam choices for Stock / Mild ( 14+ In/HG vacuum ), Street / Strip ( 8-13 In/HG vacuum ), and Race ( 7 or less In/HG vacuum ) More aggressive camshaft grinds will likely require laptop tuning with the aid of the Sniper Software in general engines . I would be trying to talk the customer into some kind of nice carburetor. The Internet know-it-alls will tell you to open the gap up to get more power. Right through their front window. Then it quits. Here are some of the materials that one of our customers used with some success: If you are using the magnetic pickup from your distributor to trigger your Sniper, there is one very important step to take. I discovered it back in the mid 1980s. Since I never throw out anything that can be re-purposed on another project I can see myself in the same situation. All engine compartments have a bounty of sources for RF noise. If you have "Magnetic" selected as your ignition type then you will see a place to set the MSV. This is where I will get all of my EFI equipment from now on.The MSV and filtering settings make a HUGE difference. At this point im not even sure i want their system to go back on..Man this is all bad. In the case of the magnetic pickup (more accurately referred to as a varible reluctor or VR), this susceptibility is compounded by the fact that many do not recognize that the sensor must be tuned to the environment. Abombadog 8 mo. All times are GMT-6. This page was generated at 09:18 PM. Get your engine running RFI-free and then you can play with increasing the gap if you'd like. Holley Sniper failed ECU - YouTube You said there was metal in the oil how would that be caused by the injection? 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? Since swapping the alternator didnt fix the issue we put the original (but still new) alternator back on the car. While it was gone out I ordered the hyperspark ignition box from u and will be starting the set up and tuning shortly. But the primary goal has to be the prevention of RFI. Connect the msd to a separate battery. My only issue as present is some misfiring popping through the throttle body. If you have done the steps above then you likely will never have any problem with RF interference. May God's grace bless you in the Lord Jesus Christ. Good luck! He said Holley said it will work and they have thousand out there to prove it. Last ditch effort. If your MSV is set to 0.0v it means that any amount of voltage that is able to induce itself onto the green/purple wire pair will be interpreted as a pulse. Normally this means you have too much gap. Shielding is really taking the wrong approach. And you can plainly see the interference riding on the RPM signal. Where you do pass these high-voltage wires ensure that the wires are running at 90 degree crossing angles--never run in parallel. But, if your symptoms persist then you need to consider that you may have an atypical RF source. It removes the oil from the bearings, now your metal on metal. Whever someone has an RFI problem they always start by explaining the effort they have made to separate their wires from each other. By accepting all cookies, you agree to our use of cookies to deliver and maintain our services and site, improve the quality of Reddit, personalize Reddit content and advertising, and measure the effectiveness of advertising. 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. For more information, please see our If you've read my article on. After letting her cool down a bit, she started beautifully, only to die again. If that doesn't work its probably time to replace that alternator. They're sending me a new Sniper free of charge, plus free shipping back to Canada. Ive been able to find some arching. A grounded plate tends to absorb RFI into the ground plane. First of all. Same. Tony from the Holley forum thinks it might be the ECU.Thanks for any help. The O2 sensor is not a passive sensor that simply sends back data. Author: Matthew D. Lunsford The car generally ran well without the air cleaner but the moment the air cleaner was lowered to the top of the throttle body, BAM, it shut off like you'd hit the key. They key is to be persistent and solve the problem, preferably by identifying and removing the source of RFI. Under "System Parameters" is a section called "Engine Parameters" and a section called, "Ignition". RF Interference is an unavoidable enemy to successful EFI operation so it must be carefully and thoughtfully managed. Thanks for the tip Chris. Copyright 2022 Holley Performance Products, Inc. All right reserved. Not because it can't be--rather, because most installers recognize that running a spark plug wire and a signal wire side-by-side and/or in close proximity is begging for problems. In fact, if you have concluded that you don't need ECU-controlled ignition timing but can't resolve your RFI problems through the other means discussed here then I'd say it is imperative that you consider switching to the HyperSpark distributor if one is available. All times are GMT-6. This despite having a quality brand of plug and coil wires that were well-routed. I tried looking this up to no avail and am in desperate need to fix this as Ive spent 8 months on this project just to get halted at the last lap. Any advice is greatly appreciated Another thing that every installer should do is remove all wires that aren't being used. Just don't trust their application guide--be sure to specify the length of each wire in your set. The first thing to do is key the system on, wait about five seconds so that the TPS zero's, and then press the throttle to the floor and watch the TPS. However, I. I read a clean RPM signal on the handheld and in the datalogs. 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. This is a great time to visually inspect the overall Sniper EFI install. However, now that we have the Sniper back, it is time to get the car running again. 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. 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. It is best practice is to increase the Minimum Signal Value (which is currently defaulting to 0.0v) up to at least 0.35v and maybe as high as 0.65 volts. Note: Do not attenpt to shorten (or lengthen, for that matter) an O2 sensor's pigtail. If you pick up soot then you've got arcing, and that's not good. Doing this requires that the rotor be custom-phased so that it is in close proximity to the corresponding spark plug tower at the timing advance position where the spark is triggered by the ECU. In the dark I see spark from the nut on the spark plugs running to the head bolts. The above paragraph is even more important for the WBO2 harness and the Crank Signal or Coil (-) input (depending on which you are using for RPM signal input.) I"m going to gap down to 0.35 to 0.45. I have a question. The problem is that the base plate is not conducting the RFI. Note also that there is a "Filtering" selection that can be toggled between "Low" and "High". Dont buy your EFI anywhere else. 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. Capability Range: Professional When downloading to the ECU in the throttle body it downloads to %100 then says error 33. Cope is it possible the regulator/ pump is going nuts and creating way too much pressure at times? Once you have done this, make sure that all of the signal wires (especially those on the 7-pin and WBO2 harness) are as far from the spark plug wires and coil wire as possible. Thanks for the update. So, a second quick check is to disable the alternator (preferrably by removing the belt). Should I change my non restistor style spark plug to a resistor type. I hope you are able to resolve it without putting in a lot more cash from your own pocket, losing time is one thing, but losing time. Solving RF Interference Issues in Sniper Installations - EFISystemPro.com Hi Chris, I recently had a sniper system installed on my 55 nomad with gm zz4 350. Was told the Sniper and the ECU tested good and that the problem was with the install. Reddit, Inc. 2023. Holley sent me a UPS postage sticker for free delivery from Canada to Bowling Green. Checked again, when I ground the white trigger wire to the HyperSpark box, I do get a spark. Thanks so much for the positive comments. My sniper was returned to Holley for warranty due to the fan#1 circuit was grounded all the time. However, a small percentage (about 10%) runs into this challenging gremlin. Cheers. *Possible delays due to Covid-19 click for more information. In the 10-pin harness, the white wire will only be used if you are doing ignition timing control. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Many times I called Holley and ask why it wouldn't tune itself. Two months later I get an email saying my ECU was definitely toast. And finally, if your engine is stalling completely at random and nothing else really makes sense, then you might have RF interference issues. It must be actively driven and controlled by the ECU. You must log in or register to reply here. We offer a spare wire removal kit for just this purpose. The immediate result is shown in the trace below. You betcha, and I did last night at a cruise in with a fellow Stingray owner who's got an EFI upgrade on his wishlist! "But you don't understand, My spark plug wires are brand XYZ, the best on the planet, and for that matter they are brand new!" OEM stuff is boring reliable, why cant Holley (an OEM TBI supplier for years) get its adapted systems right? Even if it acts properly when powered off you might want to just get a new TPS and try it. Price Point: $$, EFI Systems based on Holley's world-class Dominator and HP ECU's. Thought I'd post this because of all the problems guys have with ECU problems. Don't get crazy--if you set this too high then you will have troubles cranking the engine. However, in the event that RFI has reared it's ugly head in your installation, these tips should put you on the right track. A few years back my friend built a 40 Merc with a 540 twin blowers and Holley FI and he had a 4 speed Lenco, and every time he would shift gears it would back fire and blow the belt off. The throttle body itself is generally fairly well grounded when bolted into place so, by extension, so are the air cleaner plates. Today my truck started fine, ran great, and is now learning. The wiring from the Sniper and HyperSpark go up and away from the distributor.We hope to write a more detailed article on this soon. What happened: A few weeks ago, while on holidays, the engine started cutting out on me after a few minutes of running. But i did notice they are non restistor style ngk b6es. This is by far the best guide to EMI/RFI sources and troubleshooting Ive come across on the web. 12-10-2020, 03:06 PM. I sincerely doubt that. It needs a mass air flow sensor to work and nobody uses one, if the did the systems would work great. PDF Troubleshooting Guide - Holley Went to back the car out of the shop one day and it would not idle for anything. They are a couple of bucks each, right? what fixed the air cleaner issue. They aren't that expensive and there is absolutely no down side to keeping a spare TPS in the glove box if that's not the problem. I've used this method for diagnosing misfires ever since! Car runs perfect now!!!!! ECU failure mode - constant resetting. - Holley Performance Products Forums Price Point: $$$. Ground different components direct to the battery. 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. Sometimes it's as simple as just changing a boot on a plug wire. Any information is GREATLY appreciated. I do have the "wall of shame" its all hand fab metal work that didn't work out. Got with Holley and the pointed me down the RFI rabbit hole. That is not true of alternators. Holley did a warranty on it and I have it back We will discuss tuning tips a bit later in this article. As always, the identification and elimination of the source of the RFI is where one's attention must lie--not doing things like shielding ECUs and grounding air cleaner bases and those sorts of things.I believe the solution lies in creating wiring "zones". Im guessing this isnt normal and could be the primary cause of my problem? To nice to throw away but it hangs on the wall as a reminder to not do that again Well good luck with it. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. And just as it stalls you look down and see a TPS reading of -22%, that's a pretty good clue. If it were then grounding it would solve the problem. Just want to take a moment to thank Chris for all of the assistance during the timing control set-up of my Sniper installation. Personally, I have had the best experience with Magnecor wires. At low levels RF interference will often reset the ECU so quickly that the engine will not stall. But most of them can easily be shortened to a length that dramatically decreases their susceptibility to RFI. Thank you very much for this article. 14.7 target AFR jumps to 16.4+. What an odd situation! Reflected RFI situations like this one requires more in-depth investigation. Not that your TPS can't fail. For a better experience, please enable JavaScript in your browser before proceeding. 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. The best advice I could give is don't be in denial. So, failing that, replacing the coil is a good way to test this theory. Start by using an ohm meter and check the resistance between the alternator case and the block. 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.. 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. If they are not completely limber inside (and they may not be if ignition energy has been burning them) then they need to be replaced. Capability Range: Advanced Even new wires occasionally have defects, and all it takes is one crack in the insulation for a wire to start arcing to the nearest grounded chunk of metal. See the spikes on the brown fuel trace? Many, many years ago I discovered the "lightning storm" mentioned in the article. Parcel arrived today and I installed the repaired Sniper straight away. How would the bad sniper cause damage to the internals of the engine? Copyright 2022 Holley Performance Products, Inc. All right reserved. Here is where the denial starts. I had my system installed by a local performance shop so I don't know where they picked up my master kit. With the advent of EFI systems like the Sniper EFI System more and more of the details formerly left to the installer are being completed at the factory to provide a "plug and play" experience. Bolt-on carburetor style EFI for your classic car or truck. 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? You've got two options: re-terminate or cut-and-splice. Sure it is. ECU Failure, Replaced, No Charges - Holley Performance Products Forums . You can take them back if you don't use them. Some wires simply won't work in an EFI-controlled vehicle. These wires should be removed at the connector and replaced with a sealing cavity plug. We took a known good alternator and bolted it onto the Pontiac but the issues unchanged. This page was generated at 09:18 PM. That's why I am not a big fan of increasing spark gap.But the in-coil arcing you are experiencing doesn't sound right to me either. You will ether need to have it rebuilt or replaced. It's being installed by a performance shop and the mechanic says the car starts and runs fine, until the air cleaner is installed. You're proof that it can be done. Normally, powered sensors are not bothered by RF impulses. PDF 4150 Sniper EFI (550-510 Shiny, 550-511 Black, & 550-516 Gold) - Holley Maybe it was like that before the sniper? Crank the engine and peak under the hood. Unfortunately, I cannot offer you an easy litmus test that shows if the coil is breaking down. Most Sniper EFI Systems are installed on much older vehicles, many with much older alternators. ago Even if it does show good continuity pull not only the alternator but the bracket as well. How did you fix the problem? Solving RF Interference Issues in Sniper Installations. After going round and round I found that the RPM readout on the handheld display goes crazy reading anywhere from 200-7000 RPM while the engine is just trying to idle. If that phasing is not precisely correct then this long arc is the source of a huge emission of RF energy. Stay tuned! Changing that may have some benefit as well. The HyperSpark unit you picked up is going to be a world better. (Yes, connect the power and ground directly to the battery!). Thanks Chris for the feed back regarding my rough running sniper/timing issue even though I bought my sniper through Holley. Cookie Notice Have you tried replacing the distributor's internal ignition module/magnetic pickup? In my experience the far majority of Sniper EFI customers never have a problem with radio frequency / electro-magnetic interference (RFI/EMI). Why? But the failure tends to be deterministic, not random. Because they are easier to purchase than the Magnecor my favor is leaning in their direction. RFI still present when new alternator is hooked up. Increased gaps increase spark resistance, causing energy to be emitted from the plug wires. Super Sniper or Sniper XFlow? Do you think it could be RF Interference. And before you put the plug wires back on, inspect the boots very carefully. No exhaust or vacuum leaks. Very good read! I don't know much about tuning but I'm getting frustrated, nobody has and ideas. Also pay attention to the contact surfaces of the rotor and the cap. Bolt-on carburetor style EFI for your classic car or truck. Second unit would be going back. 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. But if you're fighting RFI then it's time to step up and do this. If you datalog the Sniper ECU and see multiple overlapping traces for the same signal, you likely have RF-induced problems. The coil is similarly mounted to put the coil wire in this zone. Last summer, a faulty ECU in my Holley Sniper EFI took out my 1972 Ford Mustang, bringing it into early storage for winter. Problem gone. That's because the ECU was seeing the same thing and flooding the engine because of the false RPM readings. Holley sniper EFI error 33 and what does it mean? : r/askcarguys - Reddit 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. Thank you Chris.Im currently fighting such a problem and its really frustrating. Dug down, cleaned up a bad ground, problem solved. Advanced throttle body injection systems capable of transmission control and more. Based on those I've helped it appears that a few Sniper EFI Systems are shipping with ECU firmware version 1.0.17. This page was generated at 09:18 PM. Terminator X Max 700R4 LS2 L92 heads and LS3 525hp cam and Jim Inglese 8 stack fuel injection. The injectors usually fire when grounded, so if you had a grounded harness, it could possibly cause the injector to go open. Atypical RF sources can be even stronger and have more deterministic effect on the ECU than the typical ones. With alternator unhooked there is no issue. 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. That is understandable, because there may be absolutely no other indication. They gave me a test for the ECU, and my Sniper failed the test. Copyright 2022 Holley Performance Products, Inc. All right reserved.
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