Thread: Hard to start. Idle surging up and down. Won't stay running.
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Old 08-23-2016, 10:06 AM
alloro alloro is offline
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Re: Hard to start. Idle surging up and down. Won't stay running.
Quote:
Originally Posted by Glennjames View Post
IAC doesn't seem to function correctly, what controls the IAC?

Also should I be able to rotate my injectors left to right at all.

Should theTPS move the butterfly?
The PCM controls the IAC. If the IAC isn't working then it might need a good cleaning or just replaced.

Yes injectors can turn, they are held in place only by rubber O-rings on the top and bottom.

The throttle shaft moves the butterfly and the TPS. The TPS is nothing more than a variable resistor that reports how far the throttle is opened back to the PCM.
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