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Thread: Do I need an IAC ???????????????????????

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    Do I need an IAC ???????????????????????

    This just started. Start the car (92 VR4) cold and it runs for 20-30 sec with rough idle and low rpm and then dies, will start right up again and the same thing happens. Turning on the A/C and turning the steering wheel does not increase the RPM so I'm thinking IAC. What do u think? Any help for this noob would be appreciated

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    Here for the party Not Verified Feedback Score 1 (100%) CoreyB's Avatar
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    Could be, will it run if you give it a little throttle?

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    Yes it will.

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    Here for the party Not Verified Feedback Score 1 (100%) CoreyB's Avatar
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    Then I would agree with your diagnosis. Rockauto sells them cheap.

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    Senior (i.e. OLD) Member :) verified Feedback Score 4 (100%) OhioSpyderman's Avatar
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    Testing an IAC is as simple as measuring the resistance of the 3 internal coils.

    If I could upload attachments, I would show you how!!!!!

    Bob.
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    Forum User verified Feedback Score 1 (100%) Amphiron's Avatar
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    Quote Originally Posted by OhioSpyderman View Post
    Testing an IAC is as simple as measuring the resistance of the 3 internal coils.

    If I could upload attachments, I would show you how!!!!!

    Bob.
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    Senior (i.e. OLD) Member :) verified Feedback Score 4 (100%) OhioSpyderman's Avatar
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    He posted on the "other" site as well, so I got him the manual pages there....

    Bob.

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    Here for the party Not Verified Feedback Score 1 (100%) CoreyB's Avatar
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    Its true you can test the resistance of the coils but this only gives you part of the story. The small amount of voltage thats used in a voltmeter to test for resistance is so small it may not detect a short and it could just be sticky and therefore not operating correctly. With the danger a bad IAC posses to the ECU and ECS it is too risky to mess around for the price of the cheap replacement part IMO.

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