Quote:
Originally Posted by tan man
Car: 1995 E320 with 216K miles.
I suspect the car has been running rich and the O2 sensor may have carbon build up.
I've been having idle surge problems. I Cleaned MAF, idle surge became slightly less severe.
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Typically, a bad MAF causes this . . . found that the "hot-film" versions do not 'clean' as well as the "hot-wire". Try replacing it with a known good MAF and see what happens.