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Re: 89 Idle Problem
When you shut the car off can you hear something clicking a few times in the engine bay? Try cleaning out the ISC (idle speed control) valve with some carb cleaner or such and see if it solves the problem. It's probably packed full of carbon and other buildup anyway after 15 years. There are only two bolts and a few hoses holding it on so it's real easy to remove and install. If you don't know where it is, it's attached to the motor side of the intake manifold on the front of the TB, has a big black cap and lots three hoses going in/out. Other than that I would pull the codes just to make sure nothing else is wrong.
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