Put a new crank sensor in, cleared code from the ignition module. Same issue - high idle, then low idle, no response when AC is turned on, idle drops even further.

Code 17 from ignition returns if engine is started. No codes in CIS module.

Thoughts, ideas?

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Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe