Question about 1988 Ford F 150

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1988 f 150 idle problem

F150 5.0 wont come off fast idle check engine lite will blink once in a wile when enige is cold

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  • bbjunk1 Jul 07, 2008

    check engine lite flashes none stop cant pull any codes

  • Anonymous Oct 19, 2008

    1988 F150 with 351 motor. Check engine light will come on and off and when it is on the oil pressure gauge will drop to no pressure. Thanks for any help to solve this problem

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Check the temp control switch behind the thermostat, but more than likely is an air leak in the plenum gasket on the intake where the plenum connects onto the intake, this is a common problem , when the gasket gets a leak the air fuel mixture is messed up and the computer will try to compensate for the lean mixture and add fuel therefore increasing rpms.

Posted on Oct 20, 2008

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