holley sniper efi iac problemsvizio sound bar turn off bluetooth

Then, the next time I cranked it, the idle went high and won't come down!" Does anyone have photos of this additional return spring they installed? But before you adjust the ECU to lean the idle out, first confirm that your fuel pressure is right. I have verified that there are no vacuum leaks, not to mention the car runs to good to have a vacuum leak bad enough to make this noise. Sorta similar to a carb having the idle mixture set incorrectly (rich) or the idle speed too low. It shuts off when coming to a stop sign, at any cruising speed and romdomly at idle in park but never when excelerating. Ilike a few othersam having idle issues. You can find those settings here: Handheld: Tuning > Advanced > Advanced Idle > Rampdown, Software: Idle > IAC Settings > IAC Ramp Down. You are aware of the idle-up problem. Its rare that you find someone that genuinely wants to help and see something work good, the information I have received from this page and Chris himself is top notch.1969 Dart GT 340 with a Holley Sniper, I purchased the Holley sniper from jegs wish I knew you sold them put on my truck got the IAC set haven't checked the -40 idle setting yet my problem is my headers are glowing red called Holley I think I got the worst person seemed to care less Afr is set at 12.8 for idle only thing I have changed I don't smell any fumes at idle someone said I could change the coolant temp enrichment but I don't know if it is rich or lean I figured since no smell it is lean any ideas would be appreciated thanks i have a fuel psi gauge reads 60 psi don't wanna melt my motor did not glow with a carburetor. Now it's at 5% on a big cam 440 Mopar. Others might require 60 RPM. I will turn it up some more.Is this something that the ECU will learn? 34K views 1 year ago Holley Sniper How to Set The IAC Idle air Control in 5 minutes or less. check out the. Unfortunately I did not buy my sniper efi from you. I am at the point where I almost insist that every Sniper EFI System owner purchase one of these. Have you confirmed your fuel pressure at idle is 60 PSI? One of them might be faulty. Sniper EFI Idle Tuning. The on board fuel pressure regulator in the Sniper throttle body has a small filter clipped over one end . When I first told him to check for leaks he looked back there and said "all good". No timing control, coil negative ignition type. If you drop it too far the engine will stumble or stall when coming off the throttle with the car out of gear, so you'll know when you've gone too far. Ran 2 Holley carbs and an Edelbrock. IAC percentage is 5 to 10% when idling with fans on, What you're experiencing is the delay time between the ECU sensing the additional load and the IAC actually increasing the RPM. But I think it is safe to say that you are now at a point were some manual tuning is a good idea. I keep wondering how it was running so good with I took some pics of the sensors page this morning after the car warmed up. Keep in mind that at 60 miles the Initial Baseline Idle Speed Screw Setting, http://forums.holley.com/showthread.neral-IAC-Info, http://documents.holley.com/199r11031r.pdf, https://forums.holley.com/showthread-Idle-Solution, If this is your first visit, be sure to He has walked me through every question Iv. I have an adapter on the manifold for squarebore to spreadbore and then a phenolic spacer. nothing stays steady. I have turned ignition off turned screw in 2 turns and turned ignition back on and tps is at 1-2% not sure whats going on. The first place my eyes go when there is any issue with the idle is to the TPS value. I would disregard any correlation between idle control between the Stock and Street/Strip setups. After it starts it idles around my 960rpm setting + or - 100rpm. So you installed your Holley Sniper. Now, 1% on the TPS isn't a problem, but when it goes to 2% (which is inevitable if you have RFI moving it to 1%) then the IAC is going to go to it's hold position (30% by default) and the engine is going to rev up. Idle Tuning is a very important part of tuning any EFI system, especially our self-learning units like Sniper or Terminator X EFI. Physially manipulating the linkage by hand will generally reveal if you have a sticking linkage that is preventing the TPS from returning from zero. Thanks. Closed Loop Compensation rises to 100%, Do I just keep pushing it the same way to Now it registers zero and I have good idle but it will not register until it hits 60 and up. Yes its at 95lbs, needless to say he promised a new regulator would be in the If you see that the ECU is commanding the IAC to 0 but there is air entering the IAC port then it's time to refer to my article on IAC Testing Procedures, Hello,I installed my sniper system on a 65 mustang, with a 302. They are prone to be inaccurate. I recommend confirming there is no throttle linkage issue first. I believe that you have this problem solved now with your new inline filter/regulator. Car was running great initially. Hello, I am having a tps and idle issue. When I shut it off then start it The very first thing I would do is get ground truth on your timing. You could install the Holley Dual-Sync Distributor and let the Sniper control your timing. I believe that for the HyperSpark the Reference Angle should be 57.5. Since the load is more of a wave that increases the most initially and then decreases again, the ECU is doing really well to get the idle under control in only two or three over/under shots as you describe.You don't mention if you have your Sniper ECU controlling timing. :-)Yes, learn impacts idle too, and remember the even when the basic learning is done there will continue to be some learning for changes in weather, altitude, etc.Go ahead and try a few idle settings and see how they impact the idle-speed searching. It's going to be really difficult to nail down the problem with the several simultaneous changes that you've made. That is not the way to go. If you can track specific engine coolant temperatures where the engine stumbles and dies that would be a good place to start. If idle drops below 800 it wont come back itll chug around 300 rpm for a few seconds then die. Fuel Flow lb / h = 12.1 Your task will be to find that. If you can send a data log to the vendor from who you bought your Sniper EFI System they should be willing and able to take a look and recognize RFI and then give you some ideas on solving it. Hey Chris, I installed a Holley sniper on a small block 400, first start was great! Holly offers a very nice Analog-Style Fuel Pressure Gauge that is another option. This was an issue in the earliest version of the Sniper firmware. Am I missing something. Holley Sniper IAC Problem 04-26-2018, 11:30 AM Hello. I would suspect something is coming loose causing a stop to the EFI system/Fuel flow. Do please let us know what you find out! My issue is that the TP% will not reset with key cycle and its idleing at 9% TP. In the Wizard, select the stock cam setting. Im thinking a faulty TPS. New install, when in setup wizard TPS says 90 percent and I checked the linkage and butterflies. This may require shortening or lengthening a rod. No air should be able to pass. For the first couple of drives it was running well, Sniper EFI was working exactly as advertised. The RPM would increase for no reason. The fuel pressure regulator in the Sniper is fairly simple and not prone to failure, as far as I know. If I block off the iac with tape , I can get it to somewhat idle, but its not consistent. Watch videos on installation hints and if you haven't yet, download & read every Sniper installation guide you can find online. Shut off car/restart and it's back to idle at This page was generated at 12:25 AM. Your suggestion to remove the PCV valve is just for diagnosis purposes, right? At idle my IAC is 3-4, AFR around 13-14, TPS is 0, timing 15-17. Not good.There isn't set solution here that works for all engines. If you have somehow overlooked this, start here: Holley Idle Speed Adjustment Instructions: Once the engine is up to operating temperature, the idle speed can be set to what was configured in the Wizard. We're never going to fill up your email box with nonsense. https://www.gmperformancemotor.com/parts/19210007.html, http://forums.holley.com/showthread.3128#post83128, If this is your first visit, be sure to Thanks. There are six different acceleration enrichment tables that you can tweak and that may be the way to go. The progressive link can be a great solution on standard (non-Stealth) throttle bodies but I would install this LAST after everything else is working perfectly. They tell you to ask call Holley. It will need to see it again and again. This will let you know at a glance if something is going awry with the fuel pump. But once you come off the throttle there is a minimum RPM that the ECU wants to see before it releases the IAC from the park position and that is normally 1000 RPM over the target idle. IAC Pos.% = 0 What I would recommend is getting somewhere that you can spend a significant amount of time doing starts. Once engine is warmed up been driving for awhile. Note too that the larger the throttle stab, the more brief the time in that cell and the more gradual the change.Here's what I recommend: Get somewhere where you can repeatedly stop and go. And if you're going to go this route I'd recommend that you switch from "Simple" (3 A/F targets, one each for Idle, Cruise, and WOT) and go to the 2-D Table I'll give the ". At any rate, once the setting was moved up, the RPM jumped right to the target RPM and was solved. Confirm the placement of all wiring, ensure that the WBO2 sensor is positioned properly, etc. Even then, recognize that over time the IAC will need to be readjusted to compensate for minor changes that will cause it to drift. Learning to install these is great--you're about to embark on the next great adventure of advanced troubleshooting. It starts cold fine, its just when its hot. This software is going to allow you to open both the configuration file and the datalogs that you create, overlay them and you can get a much better idea of what is happening. Have you ever experienced a high idle once the engine reaches 200 degrees?Ive set my idle the way you said and it works great until the engine reaches 200 degrees. Copyright 2022 Holley Performance Products, Inc. All right reserved. What might cause the TPS to go to 2%? Well you were right air was entering from another source. So this is my issue ( I did just email Holly). The only way to confirm RFI problems is by doing a data log. I believe because the TPS is not registering. It then idles up from 750 to 1100. Please check your process again and see if you can see very specifically what is not working correctly. Always had to set idle above 950. It's called tuning. Even at 0% it's sucking a bunch of air through the IAC port. If your TPS has snuck up to 2% then your IAC will be at the hold position, which by default is 30%. After doing TPS reset it starts fine but when you give it some gas it hangs at 1500 and will not return to idle. One of the signs of a vehicle with a rough idle is a faulty Idle Air Control (IAC) Motor. If you go too high then the motor will not return to your target idle when you come off the throttle. It is reliant on the data acquired by the included wideband oxygen sensor. If they are closed, check the primaries. Get a solid feeling for where it is when the engine is warm and the idle speed is correct. If your fuel pressure regulator has failed (and they often fail by blocking return fuel and maxing your fuel pressure) then it could lead to rich idle, particularly until your engine gets up to temp. Now I have most of the bugs worked out it runs fine on the highway and around town it's just the idle. Again, I would lean on that solution to let the vehicle drive/learn before you try to "fix" anything. Thank you for your input. Is that normal? It'll start & run till it's warm, then when I try setting the IAC every time, I try getting it between the 2 & 8% it quits. When the lambda is 1.0, the displayed AFR is 14.7;1 REGARDLESS OF THE FUEL. Your mechanical advance will naturally change the timing a bit but it should be fairly close. The problem I'm having is I cant get the IAC to drop down off 100%. Otherwise, if removing the air cleaner eliminates the whistle then try to use a thicker gasket or try lightly greasing the gasket. I am extremely suspect of what you were told about the Sniper ECU monitoring fuel pressure, for several reasons. If your RPM is 2000, your TPS is 0, and your IAC is not closing, then there is some problem. I pulled over and turned the car off and then back on. Thank you very much. Or alternator? Im not sure what its doing, have messed with after start fuel, fuel at cranking. Thank you chris for for getting back to me on this matter.I'm using russell hi pressure gas line to feed the gas up to the sniper and using the stock steel gas line that use to be the feed line for the carb to return the gas to the tank.

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