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poor running, ideas appreciated, recap 200 1991

uid 27's pic
posted by  Art Benstein on  Sun Oct 2 04:31 CST 2016
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last visit: Fri Oct 17 20:10 CST 2014
[RELATED]

"The ECU us fine, (the O2 sensor is old, and I think one of the codes is for O2 sensor, but it makes no difference whether it is connected or not, and from my past experience, it has very little effect on engine performance or idle). "

Check the codes again. Be sure of what you are reading and make sure you get them all. Your past experience is fooling you. Yes, of course the ECU is getting erroneous info. It may not be necessary for an oxygen sensor to work in starting the car, but as soon as it heats up and generates its own voltage, a lying one can adjust the mixture much more than a fine trim.

Your car has the symptoms of an oxygen sensor contaminated or shorted, so if you do get your scope out, connect it there first. But I agree, your daughter's brakes need to be fixed first.
--
Art Benstein near Baltimore

Women sometimes make fools of men, but most guys are the do-it-yourself type.






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