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Thread: Surging idle when coasting

  1. #41
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    The tune named "- 2002_Camaro_COS_383_0035 test" is the one where i added 2g/s of and set the base idle to 26 degrees.

    the tune named "- 2002_Camaro_COS_383_0034" is the tune before those changes were made.
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  2. #42
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    Try this tune file. Do a RAFPN and post the log.
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  3. #43
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    Subscribing...

  4. #44
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    Well I finally got the car back out and took it for a spin today. This tune file does seem to have helped with the surging when coasting to a stop. However, now it wants to die when coming to a stop. I have to hold open the throttle slightly when coming to a stop to prevent the engine from stalling. Thus I'm assuming I need to command more idle air flow.

    attached is a log file.
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  5. #45
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    Did you do a RAFPN before you made this log or is the log made from the exact file I gave you?

  6. #46
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    that is the exact file I received. I have performed a RAFPN and RAFIG. For the in gear one I simply put it in drive and held the brake, odd thing is it shows needing less air then in park/neutral? is this normal? or should I take the P/N one and add slightly to get the values for in gear?

  7. #47
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    Does the engine still want to die after doing the RAFIG?

  8. #48
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    Yep, pretty much if it is in gear and you are going slow, if you let off the throttle it will die. Or almost anytime you come coasting to a stop, it will die once you stop. I'd guess as soon as it enters "idle" mode is when the engine will dies. attached is a log and the tune file with the desired airflow after doing RAFIG and RAFPN.
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  9. #49
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    Okay, something is going wrong with your RAFIG... your "In Gear" values end up a lot lower than your "Park/Neutral" values.

    Try this update. Do a RAFIG but don't apply it to the tune, just log it... then do a short driving log and post both logs.
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