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idle has hesitation?

This is a discussion on idle has hesitation? within the General Help forums, part of the LSx Technical Help Section category; My car seems to be idling low, When i put it into gear the idle drops down to about 250 ...

  1. #1
    Junior Member ssxcytmnt's Avatar
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    2000 Camaro SS 300K

    idle has hesitation?

    My car seems to be idling low, When i put it into gear the idle drops down to about 250 rpms the goes back up to 750rpms, It doesnt always do it but does it quite often....The fuel filter is first on my list to change, any other suggestions?

  2. #2
    Member fast enough Z28's Avatar
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    silver
    98 camaro z28 m6

    I would clean your butterfly valve on the tb and clean the iat sensor. If its none of those maybe your throttle postion sensor is bad.

  3. #3
    Ricekiller z28punk's Avatar
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    Pewter
    2002 Camaro Z28

    i had that exact same problem on my Grand Prix GTP.
    all i did was take the IAC out and cleaned it, and i also took the TB off and doused it in TB cleaner.

    i never thought such an easy fix could have such a big impact on performance

  4. #4
    We'll be back... GatorSS's Avatar
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    Light Pewter Metallic
    2000 Camaro SS M6

    Clean the MAF sensor wires, too.

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    00 LS1, WS6, V8 Gremlin
    96 & 98 GTPs, 64 'Cuda

    Classic symptom of an IAC having a gummed up pintle &/or seat. Piece of cake to remove and clean with a can of Berryman B-12 Chemtool.

    A leaking EGR can also cause this, also an easy item to remove and clean.

  6. #6
    Member adham's Avatar
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    im having the same problem
    stupid question but where do i locate the IAC and IAT??

  7. #7
    Life in the Fast lane sunsetorangess's Avatar
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    I would clean the iac like said above also clean your maf, you can pick up some maf cleaner and use it for both. Brake cleaner works great too clean you iac but the other spray will work.
    The red circle
    The iat is the lil sensor in the airlid. Toward the motor.
    J
    Last edited by sunsetorangess; 12-01-2006 at 02:57 AM.
    2001 SS, Its not the car its the Driver that matters....

  8. #8
    Member adham's Avatar
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    Quote Originally Posted by sunsetorangess View Post
    I would clean the iac like said above also clean your maf, you can pick up some maf cleaner and use it for both. Brake cleaner works great too clean you iac but the other spray will work.
    The red circle
    J
    thank you!

  9. #9
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    00 LS1, WS6, V8 Gremlin
    96 & 98 GTPs, 64 'Cuda

    The IAC is located in the side of the throttle body. Black plastic, about 1" diameter by 1-1/2" long. It's held in by two small Torx screws or in some cases allen head screws that you need to take care not to lose when you remove it.

    The IAT is simply a temperature sensor that's somewhere in the intake airflow before the MAF and throttle body. It rarely causes problems it can't hurt to clean it, matter of fact just the action of unplugging & reconnecting the connector to it can be of benefit.

    I'd be very careful as to what you use to clean a MAF, as indicated above brake cleaner is usually safe but you really need a cleaner considered safe for a MAF.

    Here's a starter page to look at: http://www.gatewaycleanair.com/mecha...4/dirtymaf.htm

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