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High idle after throttle service? 200

posted by  jon_h on  Fri Feb 29 02:24 CST 2008
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last visit: Fri Oct 24 11:57 CST 2014
[RELATED]

Recently I've done throttle-body services on an 86 244 M46 and an 89 245 AT. Both now idle at ~ 2,000 and it doesn't go down when warm.

I replaced the flange gasket; checked all hoses; checked the flexible air intakes; checked the electric connections on the throttle position and AMM/MAS; checked nuts. No difference. In both cases I removed and cleaned the breather box.

Thing is, I've done this several times before (on different cars) and never a problem.

I expect I'm overlooking something obvious - probably a cracked hose. But any chance I could have broken something when I pushed the wiring harness over to remove the breather box?
--
a few 1985-92 240s & 245s - parts cars & drivers






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