300TE surges to a high and low idle at stop
My 88 300TE is being totally reconditioned to like new and there is one problem with the idle I need to correct. When the car is cold prior to putting it in gear to drive, it idles very fast until it’s warmed up some. It also surges to a high and low idle sometimes at a stop sign, after being driven for a bit and has gotten warmed up. If I kick the throttle to a high rev and immediately release it then it goes back to a normal idle. Is this due to some kind of idle control modulator that needs replacing?
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