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car idles better with tps sensor unplugged

This is a discussion on car idles better with tps sensor unplugged within the Computer & Tuning forums, part of the LSx Technical Help Section category; So I bought I new one and problem still there. Once the car goes into closed loop the idle gets ...

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    car idles better with tps sensor unplugged

    So I bought I new one and problem still there. Once the car goes into closed loop the idle gets low and rough. Then if I turn the car off and restart the problem goes away for a while.

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    May be the IAC.

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    I tested both that and the tps before with a digital multimeter and they tested fine.

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    Junior Member sleeper's Avatar
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    Just trying to help. Mine had tested good with a dvm. IAC may not be your problem.
    To test IAC you must drive it in 100 rpm increments up to I think 1800rpm and back down looking for any control issues

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