Question about 1995 Buick LeSabre

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When the car is parked, in nuetral or stopped at a light, the engine will rev up like im pushing down on the pedel and stay revved.

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  • alexandervai Aug 07, 2010

    what is a vacuum leak? the 1995 buick lesabre is starts reving right after the car is started and revs up on and off when your driving

  • alexandervai Aug 07, 2010

    thanks alot guys, saved me a trip to the mechanic$$

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Get the IAC checked.The idle air control valve.
The idle valve is probably stuck. It probably needs to be changed. This may also indicate a vacuum air leak. The idle and all other vacuum systems are connected. If one leaks, the idle may be effected.
The idle air control motor (IAC) is located at the top/front of the throttle housing and has a black electrical connector with four wires attached to it. The nose of the "new" IAC valve must not exceed 28mm or upon installation the "new" IAC can be damaged according to the installation instructions in the workshop manual.  Simply remove the screws securing it to the throttle housing and replace. 

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Posted on Aug 07, 2010

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Either there is a vacuum leak which is most common, or you could have a dirty IAC valve. Check for any vacuum leaks first.

Posted on Aug 07, 2010

  • alexandervai Aug 07, 2010

    would a vacuum leak be a fix it urself or need to bring to a shop

  • Nate Stansfield
    Nate Stansfield Aug 07, 2010

    Vaccum leak is a leak in one of the rubber black vacuum lines.
    Everything needs to be at a certain vacuum pressure or it can throw the entire engine off.

    A dirty throttle body can do this also. Same with a faulty camshaft position sensor.


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