Question about 1988 Ford Bronco II
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
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
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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Posted on Jan 02, 2017
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