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lack of rpm?

Discussion in 'VN - VP Holden Commodore (1988 - 1993)' started by h0Ld3n`VN, Jul 29, 2008.

  1. h0Ld3n`VN

    h0Ld3n`VN New Member

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    whenever im parked on D the idle goes allmost 400rpm?
    especially when im driving and stopping at the lights i go to brake it just drops to 200rpm, 5 out of 1 it will stall at the lights?
    does it all the time dont know why??
     
  2. Cursed CX8

    Cursed CX8 Banned

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    IAC?

    Maybe reset the ECU and then reset the IAC.
     
  3. h0Ld3n`VN

    h0Ld3n`VN New Member

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    i reseted the ecu a few times.. still the same, how do you reset the IAC?
     
  4. Bz Kn33z

    Bz Kn33z Active Member

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    get some throttle body cleaner and clean out the T/B and clean out the IAC while your there chances are its clogged, is the engine light coming on at all, before you stall dont reset the computer untill you get a code, wait for it to give you a code the see what it is if the engine light is coming on, but i would start with cleaning the T/B out
     
  5. h0Ld3n`VN

    h0Ld3n`VN New Member

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    yea i checked error codes many times, just changed my sparkplugs they were destoryed.. throttle bodys clean as, n i gave it a clean anyway while i was at it.. wheres the iac located?

    engine light error code does come on n i know whats it from, my speed sensors dead
     
  6. Bz Kn33z

    Bz Kn33z Active Member

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    IAC (Idle Air Control), located in the throttle body, at the back of it,
     
  7. h0Ld3n`VN

    h0Ld3n`VN New Member

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    how do i reset it? it might be my ecu tooo grrr
     
  8. Bz Kn33z

    Bz Kn33z Active Member

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    Get a mates ecu and put it in the car see how it goes, you cant reset the IAC unless u take the battery terminals off, and reset the computer.
     
  9. vn calais manual

    vn calais manual New Member

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    it will be your IAC valve.
     
  10. h0Ld3n`VN

    h0Ld3n`VN New Member

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    allrite thanks guys been reading on a few other threads.. there could be crap stuck in there, if not i gotta get a new one.. if reseting it doesnt fix
     
  11. Bz Kn33z

    Bz Kn33z Active Member

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    get some T/B cleaner and spray it into the holes in the T/B it will get into the IAC and clean it, or take the T/B off and unscrew the IAC and see if there is any problems with it, and clean it properly out of the car.
     
  12. Anthraxnz

    Anthraxnz New Member

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    Throttle body is easy to get off, just 2 nuts but watch the gaskets ;)
     

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