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Old 08-23-2011, 08:35 PM
rgnprof rgnprof is offline
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Join Date: Feb 2003
Location: Oklahoma
Posts: 1,081
I turned the mixture screw using my 3mm wrench - mostly CCW, which dropped the duty cycle down in the 30-40% range. This effected the idle too much - too slow...so I adjusted it CW. Got it to even out with duty cycle in upper 50's, but idle was too fast - probably 1100 rpm's. So I brought it back down - CCW - to where I am now.

Quote:
If it won't idle down, then it would seem the IAC is not adjusting properly, or it's turned all the way down and you have a stuck throttle blade
I don't know if I can adjust the IAC valve - I did unplug it and idle really speeds up and I hear a serious air leak. What do you mean by the throttle blade? I am thinking I need to adjust the air sensor plate...
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1984 300D
1972 250
1986 560SL
1991 300CE
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