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High Idle - Not IAC - What ?? (Still Not Resolved) 700 1991

posted by  Lummer57 on  Mon Aug 2 05:38 CST 2010
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last visit: Thu Oct 28 03:22 CST 2010
[RELATED]

Original poster back again. This morning I cleaned and adjusted throttle body. It wasn't horribley gunked up or dirty. Doing this did not make any difference at all. Still have high idle. Actually now it is even a bit higher. About 1200 rpm in park and about 800 rpm in gear. Also I plugged and replugged all related elecrtical connections(at throttle body, at air box hose, at IAC) to be sure they were clean and seated securely. Now for some reason check Engine light is on in dash. So I am still stymied with this problem. Not sure what to check next. Still thinking maybe temperature sendor on block might be bad or maybe air temp sensor on hose to air box(however when I unplug this connection still have high idle). Any further input/advice/help is greatly appreciated. Hate to have to give up and bring it into the indy shop. Thanks very much.
--
' 88 740GLE auto wagon nearly 202,000 and ' 87 240DL auto sedan nearly 135,000






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