Hello I have a 1985 380sel and when she is warming up the idle jumps up and down from 500 to 1000 rpm's! Then when she is warmed up it runs fine! Any advice?? Thanks, Ken

Check/clean your idle control valve. It could be sticking around the "warm up" range.

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A.S.E Tech A1,A6,A7,A8 & MVAC 609 + EPA 608

Unless stated otherwise, any question I ask is about my greymarket 1985 380SEL.