Question about 1989 Honda Prelude

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1989 honda prelude. engine surges. from normal to 2100 rpms

1989 honda prelude. engine surges. from normal idle to 2100 rpms back and forth. what to do to correct problem. i have already changed out the idle air control valve.

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  • scott061768 Oct 01, 2009

    I need to know the specific componanent that is the problem. The valve and inlets are on the bottom of the idle air intake valve which was replaced.

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There is a warm up valve on the throttle body(should have 2 small coolant hoses). remove the valve and have someone start the car while you block the port to the valve on the intake. If that clears up the problem you can cut a piece of cardboard to mount in between the valve and intake.should straighten it out.

Posted on Oct 01, 2009

  • yankstorm02
    yankstorm02 Oct 01, 2009

    As I said there is a "Warm up Valve". Not the IAC which is notorious for creating your problems. There are 2 small 12mm hoses and an electrical conn. on the valve. Should be behind the intake.Look for the hoses..

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