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Thread: IAC got stuck again.

  1. #21

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    You should be OK then.

  2. #22

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    Mine pretty much does the same thing. I was getting a huge air noise at times. The IAC read 0%, but it sounded like it was stuck wide open. Then the idle gets stuck about 150 - 200 RPM higher than I have it set at. If I cycle the key it goes back to normal. I replaced the IAC. The stuck wide open IAC issue is resolved. The high idle problem is still there. I'll have to check my throttle blades the next time it does it.

  3. #23
    Join Date
    Oct 2016
    Location
    Albuquerque, NM
    Posts
    118

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    Have you seen this? Specifically the idle speed curve at -40°F?
    https://www.efisystempro.com/efi-pro...roubleshooting
    1968 Camaro, 383 with Dart Pro 1 aluminum heads and Comp Cams roller cam, Holley Sniper EFI with Dual Sync distributor, Muncie M21 4-speed transmission, 3.73 12-bolt Eaton posi differential.

  4. #24

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    Not sure if the article is directed towards myself or other members who’ve chimed in with their own problems. 99% of the time I do not have issues with idle speed. It will idle right around my target speed +/-15 RPM. I did however, read that article before installing my Sniper as well as many of the other write-ups from that site and like them.

  5. #25
    Join Date
    Oct 2016
    Location
    Albuquerque, NM
    Posts
    118

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    Sorry, I hit “Post Reply with Quote” to rosco15, but I guess it didn’t take.
    1968 Camaro, 383 with Dart Pro 1 aluminum heads and Comp Cams roller cam, Holley Sniper EFI with Dual Sync distributor, Muncie M21 4-speed transmission, 3.73 12-bolt Eaton posi differential.

  6. #26

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    Do you have an adjustable linkage for the secondaries? Something like this?
    https://www.efisystempro.com/related...ve-linkage-kit

    I noticed when installing my adjustable linkage that if I set it to fully open the secondaries at WOT, there was a very small opening of the secondaries at 0% throttle, then they closed at ~10%, then opened at ~40%.

    Probably not your issue, but throwing that out in case it helps you or someone else.

  7. #27

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    Quote Originally Posted by bryaneh View Post
    Have you seen this? Specifically the idle speed curve at -40°F?
    https://www.efisystempro.com/efi-pro...roubleshooting
    Yup, done that. Great writeup.

    Sorry didn't mean to hijack your thread. Just posted up as my issue sounded just like your issue.

  8. #28
    Join Date
    Jan 2010
    Location
    Brisbane, Australia
    Posts
    1,593

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    Quote Originally Posted by bryaneh View Post
    Have you seen this? Specifically the idle speed curve at -40°F?
    https://www.efisystempro.com/efi-pro...roubleshooting
    That's a very interesting piece of info. Thanks for posting that. Gary
    Regards, Gary

  9. #29

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    I moved my spark plug wires under my headers and yet again made sure all Sniper related wiring is no closer than 4-5" from the distributor or any ignition related stuff. I haven't been able to replicate the IAC event as of yet. When I look at my datalogs, they still seem jumpy, but may be normal. I zipped the shortest one I have from the last few days hoping that one of the experienced guys can get a look at it to verify whether things are looking normal or not. Thank You!

    As usual, the forum uploader will not work for me. I uploaded the Config File and datalog individually as well as in a zip folder here: https://drive.google.com/drive/folde...B3?usp=sharing
    Last edited by HeavyChevy; 09-18-2019 at 05:40 PM.

  10. #30

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    Anyone, pretty please? Ha, ha.

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