holley sniper efi iac problems

If that tested out okay then I can really guess that there might be some sort of intermittent, temporary RFI. Put a strong piece of tape over the IAC breather hole--duct tape or something that couldn't possibly be sucked into the throttle body. Since your target is probably more like 700, and since 2400 is way over 1700 RPM, it's going to leave the IAC in the park position.Buckle down and find how air is getting into your engine. So I had my Idle set up perfect, with idle timing control off and engine hot the IAC was right at 2-4%. We have shipped quite a few of these to customers in Australia and New Zealand so I know that there is becoming a good following there!We recommend this Inline 10-micron fuel filter to prevent problems like that. I've been messing around for a bit trying to eliminate any possible vacuum leaks. holley efi. By the way your site and your accessory products are nice. Installed sniper on 65 galaxie. You'll be amazed at how much of this just "goes away" when you drive it enough. The second thing to realize is that even after you get it just right, you need to keep an eye on the IAC number and reset the idle if it gets outside the 2-8% range when idling when warm. After the start process, If the idle speed is higher than the target idle then the IAC should begin closing as long as the TPS is below 2%. 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. Learning to install these is great--you're about to embark on the next great adventure of advanced troubleshooting. With an assistant pressing the accelerator, you need to make sure that when the accelerator is pressed to WOT that the throttle blades are fully opened, and when accelerator is lifted the linkage is fully at rest against the idle speed screw. Unless you have ignition control enabled, that is the only thing it can do to reduce the idle.Realize the only things that can cause the car to idle up as you describe are air and ignition advance. As soon as I got the new one installed and wiredit fired right up and did everything it was suppose to do with no issues. If the regulator is working correctly and there is no restriction in the return line that should make no difference however.Sorry I didn't see this on the Holley forum. You'll have to go back and forth a couple of times to get it just right. The fuel pump is mounted under rocker panel as low as possible and far away from any heat. :-)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. Did you find this enlightening? I have now determined with the TPS the noise correlates with the opening of the secondary butterflies. Throttle Tip-In puts you in a part of the fuel map where you stay for only milliseconds at a time. I have a set of 8.8 Accel Rfi suppression wires on it. Observing the temperature on the 3.5-inch handheld (only), wait for the temperature to achieve 160 degrees F. Once above 160 degrees, turn the idle speed screw so that the idle is about 50 RPM below your target idle speed set in step 1, above. Thanks. Holley - 543-105 EFI Idle Air Control Motor , Black - amazon.com The first 250-300 miles were amazing as the Sniper EFI worked flawlessly. Sniper is still learning so it will continue to improve.Second, you may have heard the phrase, "correlation is not causation." If that happens then follow my 10-step process shown above. 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. port that goes right on the inlet of your Sniper and makes installation a breeze.If your fuel pressure is solid at about 60 PSI then you should start looking at Using the handheld, navigate to Tuning > Basic > Basic Idle and ensure your target idle speed is set to the RPM you desire. The warmer the motor, the higher the idle will be at this point. Duration @.050 is 240 intake 246 exhaust with .574/.578 lift. I did read some comments on regulator issues is there a way to check it for an issue ? What I can't explain is why your TPS is acting so randomly. I can get it to fire up on the Idle was around 1000 mark and iac 0. I went on the good ole interweb and found your website which was VERY helpful! Solving Holley Sniper High Idle Issues - EFISystemPro.com So if you are trying to achieve a stoichiometric mixture in ethanol (which is achieved at an AFR of 9.0:1) then you should continue to target 14.7:1 since that is what will be displayed. I think that a great number of the challenges that Sniper EFI System Owners face are brought on themselves by getting into the control settings before the system has really had a chance to learn. They also worked with me on a sale I missed and price matched those parts. Yes, you are correct. The throttle plates are misaligned. It's not necessary to drive it that way. Throttle body mounted ECU - no extra boxes to mount. You're going to have to get this fixed or it's going to cause even more problems than the high idle. Data logs show no EMI/RFI. I have never seen issue when CTS is below 120 degrees. THANK YOU for the "First--Check Your Idle Speed Curve Setting!" Ive played with the timing on this thing multiple times.Car was fullly restored last year. I believe that you have this problem solved now with your new inline filter/regulator. It sounds a little different from mine, since it commands a 1300 or so increase intermittently. Target AFR, A / F = 13.5 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. I am at the point where I almost insist that every Sniper EFI System owner purchase one of these. IAC is good 0-5% most of the time. Also what would you say a desired idle should be for a 3 speed automatic ford? Adding a wrap to the return spring on the shaft is one alternative to solving this. It sounds to me like it is way retarded.In the event that the timing is right then take a look at your AFR--the actual AFR, not the target. I tried adjusting my IAC up to 10deg in both directions with no change. The RPM would increase for no reason. Sniper setting is Stock camshaft. In addition to avoiding this particular problem, the total solution is much better. I have not heard of this. Intake has been on and off 3 times no change. We will definitely be sticking with Holley from here on out for future retro-fits. I did check for the lightning under the hood but all was well. Thank you very much. Though it started and ran good, it was dumping fuel and would not lean out to AFR set points. I'm wonder if the iac can cause this. So something is triggering the ECU to be in Open Loop. The fuel pressure regulator in the Sniper is fairly simple and not prone to failure, as far as I know. I've read that a spacer with 4 individual holes will solve this, but after I installed the progressive linkage the noise went away!! That will at least tell you something. It could be that you've left a vacuum port unplugged, it could be that the throttle plates are misaligned (unlikely), it could be that your IAC is not closing properly. The resulting resistance can burn up fuel pumps, wiring and relays. Your suggestion to remove the PCV valve is just for diagnosis purposes, right? Due to when the pump i'm using now makes a loud howling noise when it gets ran for awhile and it gets at a 1/4 tank of fuel or less. If the engine will after the 4 seconds that the IAC kick drops off then it's not really going to help.At any rate, it costs you nothing to advance the ignition and see if that doesn't improve the idle, right? The engine ran so good, I would have never suspected the Fuel Pressure to be an It is good to at least know that the Sniper fuel pressure regulator can have high pressure failure issues (contrary to what I posted to Scott back on April 13th!) This may sound crazy but I'm going to jump out on a limb here and say you don't have an idle issue--you have a timing issue. There are six different acceleration enrichment tables that you can tweak and that may be the way to go. Sniper EFI Idle Tuning. And the rather cavalier "Absolutely!" Note: The IAC breather hole is the roughly 1/4-inch triangular hole that sits above and between the secondaries. What can I do? The answer will divide the possible sources of additional air into two, greatly simplifying the problem.If the IAC number has not increased, then review the article above regarding high idle from a vacuum leak or high idle from sticking linkage. 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. The jack-rabbit start can usually be minimized by adjusting the throttle linkage. Ive also used another snap on light to confirm. I have quadruple checked my wiring and am certain it's correct. That is not something I'd ignore. The car cruises fine, and if I was to keep idle at 2000rpm the issue wont happen, its only when the car tries to ramp down to idle position.Thank you for your help, any advice would be appreciated.Thank you,Eric, Whenever we see the AFR go to "Heating" that is an indication that the ECU has been reset. In the setup, I set the hot idle for 850. When I shut it off then start it I managed to get the IAC down to around 0% - 8%is this good? When I put it in park the idle RPM was 2100-2200 each time. 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. Running a bbc with coil - my timing is perfect. While confirming, in the handheld ensure that the Reference Angle is set to 57.5 and that the Inductive Delay is set to 100. )So before I hook up another gauge to see if the Auto Meter is bad (assuming I can find a 0-100 test gauge in my shop). Does that make sense to you? 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. What might cause the TPS to go to 2%? I'm Having trouble with the Sniper on high Idle. We offer some tips to help with that. Maybe give it a half-turn before you start it and then start and tweak. I'd say make sure you buy from someone who can give you good after-purchase help (hint!) back to trying to zero down an idle. My sniper is doing two thingsFirst issue, the idle is set at 800 and will idle fine, then There is a glitch in the system. Simply turn the idle speed screw on the linkage in until the throttle plates open enough for the idle to increase. Laptop Access I have a feeling it's something simple but I thought I'd ask you first before I inadvertently change something that affects other areas. The next time it happens is the perfect opportunity to find the problem. One thing you need to sync the timing and set the inductive delay. May God's grace bless you in the Lord Jesus Christ. 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. I did notice that when I thought I had it set However I do have a couple of issues I hope you can help me resolve. I can tell you that when things aren't working the way you wanted them to work that nothing beats knowing for-sure that you don't have a fuel supply problem. Key, I believe, in this success is solid connections, resistance-free signal and ground paths, and solid RFI rejection. With select intake manifolds, the distributor housing and IAC valve on the back of the Sniper EFI throttle body are fighting for the same . If your TPS has snuck up to 2% then your IAC will be at the hold position, which by default is 30%. From herethe cycle continues and I am If I'm driving along and pull up to a light and leave it in gear it idles just fine but it seems not to be able to compensate if I put it in neutral and then back and drive. But now that Terminator X is available, I highly recommend going that route. I will confirm TDC with balancer but I have had balancer off and timed it before and after with same results. There is a chance that the IAC is open but displaying 0% so start by putting your finger over the IAC opening. If the screen shows iac at 0 and you block the hole to find it open what does that mean? Sniper EFI Idle Tuning - Holley Motor Life If you look down and your TPS is 2% then either your throttle is stuck slightly open (which itself will cause the idle-up) or RFI riding on the TPS signal has caused the ECU to see the throttle as open and, as a result, open the IAC to the hold position.

Bedford Police Wanted List, Alexandra Wallace Ucla Where Is She Now, Jumping Cow State Wildlife Area, Articles H