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?
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a few 1985-92 240s & 245s - parts cars & drivers
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