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

[1gRick]

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

[CoreyB]

Could be, will it run if you give it a little throttle?

[1gRick]

Yes it will.

[CoreyB]

Then I would agree with your diagnosis. Rockauto sells them cheap.

[OhioSpyderman]

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.

[Amphiron]

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.

TinyPic - Free Image Hosting, Photo Sharing & Video Hosting

[OhioSpyderman]

He posted on the "other" site as well, so I got him the manual pages there....

Bob.

[CoreyB]

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.

[Nytron]

Stealth 316 - ISC Servo Motro

See step #2.