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Idle Question.... Please Read 700 1990

My 90 740GL is running better thaks to the help from this forum.

I've cleaned the IAC and flame trap, after I start it up the thing runs great.

But startig it up seems to be hard on it, I crank it about 3-4 times and it starts then ALMOST dies, everthing thing shaks and vibrates then the IAC kicks in i'm assuming and the idle smooths out and it runs great until I turn the ac on, which makes it idle lower and start to vibrate when i brake at a stop sign (doesn't the iac control that?)


So i'm wondering if it's the throttle body not closing all the way or a relay of some sort.


THanks






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