holley sniper efi iac problems

Holley EFI 543-105 Idle Air Control Motor Even at 0% it's sucking a bunch of air through the IAC port. knowledge with the sniper efi setup. Sniper EFI - Holley All times are GMT-6. Incorrect connections will result in excessive resistance. Can the return line be an issue?So far this sounds like an ideal setup.>I have had 2 faulty gpa-4 255 walbro pumps go bad. At some point you come upon problems that evade the easy answers and this is a good example. started up the engine. The biggest issue is these problems are intermittent meaning they do not occur all the time. Wish I knew about it before I made my purchase. The throttle position should be zero. 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. When running it will only stay in closed loop and learn at idle. Any suggestions would be appreciated. Data logs show no EMI/RFI. I received from the controller manufacturer greatly understates (at best) the repeated failures of others I know personally who have tried and failed. Hello, I am having a tps and idle issue. This will tell us if the ECU thinks that it is in control of setting the idle or if it thinks that you are driving the engine speed with the pedal. Laptop Access Your second problem should be a bit more concerning. :-). I have been reading these posts and have learned a lot. I emphasize "and" because the transmission controller manufacturer I used had the TPS ground terminated within the harness to the unit's main ground, which I find to be an unthinkable choice. Overview. TPS% = 1 A simple remove & clean will remedy this . That's a nice change of pace--a low idle issue! Changing the rpm curve and target rpm has no effect. I think that your timing is too retarded. The Sniper EFI remote IAC (Idle Air Control) and plug is designed to gain installation clearance on some Sniper EFI 2x4 installations. I would continue checking the electrical connections along the fuel supply. When you key on, you will hear three distinct sounds: The ECU initializing the IAC, the fuel pump priming, and the injectors firing their prime shot. (It should be at or near 60 PSI at idle. Hopefully replacing the pump again will resolve both issuesWhoa. I also tried changing roc/map to 8 from 15 again no change at all.My ve table is smooth and tuned I even changed my AFR to 13.5 from 14.2 and no change at all. Give us a hand! Then follow all of the instructions above, including confirming the idle speed curve setting at -40 degress as well as following my 10-step process for setting the idle. Ran 2 Holley carbs and an Edelbrock. It sounds a little different from mine, since it commands a 1300 or so increase intermittently. He has walked me through every question Iv. 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 In your case, however, I think you're close to getting it running. Is there away to program the ecu to compensate for this at start up. Make sure that your blanking level is _below_ that (being careful not to find yourself in the situation I describe above.) Holley EFI Electronic Fuel Pressure GaugeI think its a little ridiculous that I cant see fuel pressure on the display even though its measuring it but whatever. I've been having problems with my sniper efi just shutting off. I have it set at 650 and it idles anywhere from 590 to 700. 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. Were the additional load a simple step function it would be challenge enough for the ECU to gracefully increase the engine speed without overshooting. I cut and heat-shrink wrapped the 5V wire and then ran both the signal and ground wires all the way back to the transmission controller. So glad this was helpful. And increasing your idle via the idle screw was also a good idea, because that will lower your amount of IAC that is necessary to keep your engine at the target idle speed. They also recommended that their ground be spliced into the Sniper ground as close to the Sniper as possible. So I had my Idle set up perfect, with idle timing control off and engine hot the IAC was right at 2-4%. https://www.youtube.com/watch?v=2JpHlS1ymBc, If this is your first visit, be sure to Nothing against Holley's method but I need to keep things simple and I do that by eliminating the effect of the IAC entirely while getting the idle speed adjusted. Thanks for the info Chris. 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. The fact that it ran so (at times) with 90+ PSI fuel pressure is a testimony to the Holley's closed-loop technology. I managed to get the IAC down to around 0% - 8%is this good? If you did not rotate the distributor to set the actual timing to 15 that might be the only issue. first attempt but as it tries to idle down to the target RPMsit can never even It's a Chevy 350 bored .030" over it has a cam in it what I was told is the cam has the firing order swapped. Every time though I can turn the car off and restart and it settles at 850 with IAC 2-4.The thing that has me puzzled is how the with the only difference in condition of the car being the restart, the idle is "fixed"Any clues on where to look next please let me know. issue. Holley Sniper EFI 543-122 Sniper EFI Remote IAC Kit :-). That Cycled the ignition off. I did read some comments on regulator issues is there a way to check it for an issue ? I believe because the TPS is not registering. The solution is to either lower the IAC hold position or increase the RPM above idle to start ramp (default is 1000 RPM). When I covered the IAC with my finger, the RPM dropped so low it stalled. That is not a huge problem but it just means the IAC has no ability to lower the idle beyond what it is running at that point. Really appreciate the amount of learning im getting off here. around 45 mph it bogs down, catches itself, bogs, catches, bogs and catches. As you see above, the Sniper is going to dump in a maximum amount of fuel at zero TPS, begins to remove acceleration enrichment at 60 percent TPS, and then removes all acceleration enrichment correction at 100% TPS. Sorry for all the questions, new to the efi world. However, I did have another fellow who contacted me that claims he went through three units before he could get one that would talk between the ECU and the Monitor. But after sitting static idling for a little bit, the IAC goes to 100% & stays there. Sometimes it sounds like it wants to crank at the start but runs out of gas. This item: Holley - 543-105 EFI Idle Air Control Motor , Black $71.72 Holley Sniper EFI 870001 Throttle Position Sensor $34.60 Holley 860004-1 92MM Sniper Throttle BDY $223.93 Customers who viewed this item also viewed Page 1 of 1 Start over Holley EFI Idle Air Control (Iac) Valve Motor 30 13 offers from $79.56 Going lower with the blanking might pay dividends, but there is so little room below 7/8 that you will quickly be in a range where every tiny variation in the TPS or MAP is throwing extra fuel into the engine. Holley Sniper Iac Delete It is made by one of the biggest names in fuel filters and sold under the Parts Master label so it is quality and great price in one. Thanks. Repeat until that stumble goes away, and then try a bit more throttle. We do that but most places don't. The Fuel Base map is perfect, the car works well, runs well, running through the streets, the car is great. Holley Motor Life 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. We have never had that problem with any of the units that we have shipped. Enjoy! Stupid question, but where do I see if it's entering Learn mode? Have you checked your fuel filter and made sure it's not plugged?If both of these are okay you're going to have to find a way to monitor your fuel pressure while under load. However, I can't think of a single one that was because of low vacuum. Plus, you can email that file to me and I can be of more help. The last pic is with the car in Drive. AGAIN This is Intermittent meaning on a recent trip I stopped 3 times and issued occurred once. If you have performed the adjustments above and still have RPM issues, it's time to look for clues. ?I never had my Carb Cold start RPM any higher then 1600 RPM.THANK YOU. 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. You may have to register before you can post: click the register link above to proceed. We offer some tips to help with that. We're having trouble with a Ford Maverick 302 V8, using ethanol. would correct it (as it has for a multitude of other drive-ability issues) but this one little glitch seems out of it's range. Price Point: $$, EFI Systems based on Holley's world-class Dominator and HP ECU's. I'm going to jump out on a limb here and say you either don't have adequate fuel flow or pressure. Relatively new Sniper EFI install on a '69 Mustang 302. When you first posted this I had no idea how to respond. One way is to very carefully watch the handheld monitor, and that may be adequate. If you complete the process and find that the IAC is less than 2% at idle, repeat the process and use the set screw to make the RPM about 60 RPM below the target. EFI parts, including the throttle body, and the problem persists.Please give me a hand. Start by doing the fastest start you can that doesn't bog. For the first couple of drives it was running well, Sniper EFI was working exactly as advertised. Now, in my lifetime of experience with Holley ECU's that seems unlikely, but this guy sounded really sharp and had nothing to gain by convincing me of his dilemma. Any ideas here? Somehow air is entering the engine that was not entering the engine when you originally set the idle speed screw. And since they really had an insanely-tight monetary and real estate budget in the Sniper EFI System, it is unlikely that the added something that wasn't absolutely necessary--and then forgot to use it..And you are spot on about the little Earl's gauge with optional -6 AN port. If I put the vehicle in gear the idle gets higher with temp. Therefore The iac will always be at 10% now, correct? I will turn it up some. Don't make any changes more than about 10% and keep the same basic shape as the original (High/flat below 20 degrees, sloped downward up to 180 degress, and then flat again above that.) If you're having issues with your Holley Sniper IAC getting stuck at 20, there are a few things you can try to fix the problem. I keep doing that with the same result. You can drop it down and you will find it will behave more like you expect. If you do find you have RFI issues then I've written an article on solving RFI problems.

Jupiter 8 Moons Strain, Damar Kaminski Funeral Home, Articles H