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Stumble on accelaration 200 1989

posted by  TG on  Wed Aug 25 17:02 CST 2004
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last visit: Fri Aug 8 07:33 CST 2014
[RELATED]

I have developed a persistant stumble in acceleration around 1500 rpm. Stumble appeared after hammering off the loose heat sheilds and also replacing a siezed up air cond. commpressor. Car starts and runs fine otherwise. Normal tune up measures have not helped and dianostic codes are normal. My suspicion is O2 sensor needs replacement, (may have been damaged when I was beating on those heat shields). Digital volt meter readings on O2 sensor output range from .05 to .7 volts at idle, .8 volts when operating at higher rpm with induced richness, and .015 V at idle with small vacuum leak. Does replacing the O2 sensor sound right? Any other suggestions?

Thanks TG
89 240 auto W/179K (his car)
88 240 5 sp W/209K (her car)






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