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IAC valve trouble

Discussion in 'Stock 1995 - 2001 Explorers' started by srj26, July 28, 2011.

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  1. srj26

    srj26 New Member

    July 28, 2011
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    1998 and 2000
    I've read alot on this problem but apperently not enough. My girlfriend's 2000 exlorer 4X4 4.0 sohc(engine code E) has a loud vibration coming from the airbox. After alot of reading I was able to trace it back to the IAC valve. So We took it back again(this is the third one we've put on it in 3 months).
    When you start the truck it makes the sound imediately,unplug the IAC for just a second and things go back to normal. Put it in gear and the vibration starts again. I even replaced the plug thinking it was getting a bad connection but that didn't work either. Couldn't find any vaccuum leaks either.
    Could a cracked intake cause this? How or whats the best way to tell if theres a crack in the intake?
    Inneed of some ideas and things to check for.
    Thanks, Steve
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