Question about 1988 Ford Bronco II

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Engine revs by itself ck engine light comes on

Engine revs by itself ck engine light comes on road speed kicks out of overdrive light comes on kicks back in overdrive light goes off when engine idles it idles real low step on gas light goes off

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  • Anonymous Mar 29, 2014

    engine light came on

  • Anonymous Mar 31, 2014

    When the light first coming on by itself I could push it off and the truck would go into overdrive. Now the light won't shut off and my truck won't go into overdrive.

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You may just have a bad idle air control valve or iac you could try removing and cleaning but sounds bad may try replacing if not problem it would be in pcm or harness issue the iac is located at the throttle body on intake manifold

Posted on Aug 01, 2010

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You would need an error code reading machine so you can find out why the check engine light is appearing, Once you have the error codes you can compare them to error codes for your make/model of car and will be able to diagnose the problem..
The Error code reader machines can be bought from car parts stores cheaply, And will help you a lot in finding the problem where its occurring, Without reading the error codes you could be randomly guessing where the issue is, There are many things that could be faulty which are causing the problem you describe.

Posted on Jul 28, 2010

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