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Re: Was no-start now high idle 700 85

posted by  someone claiming to be Don Foster on  Sat Jun 16 12:55 CST 2001 [RELATED]

"...disconnect the AMM, it smooths out momentarily and drops a couple a hundred then creeps back up..."

I hope you're unplugging and replugging the AMM with the ignition off.

"...disconnected the constant idle motor connector-no change at all. I pretty sure it's working..."

Try squeezing shut one of the large (~3/4") rubber hoses from the idle air valve (IAV). If the idle drops, then the IAV is the source of the extra air.

It's possible the throttle switch is defective, disconnected, or the throttle is out of adjustment. This switch closes when the throttle returns to idle, and the switch tells the FI ecu to engage the IAV (also called the CIS motor for "constant idle speed"). If the ecu never knows that the throttle is at idle, it won't attempt to control idle.

"Any body got any suggestion?"

You may have already damaged your AMM. These are sensitive devices.





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