Very rough idle, 92 525

[aecs8284]

1992 525i, m50. CEL, o2 sensor code. Changed o2 sensor, ran great for 5 minutes. 10 minutes later started fine and then VERY rough idle (car bouncing rough) and CEL. MAF code this time. Disconnected MAF and it runs OK. Does something need reset or do I need a new MAF?
Craig

[sneekens]

since o2 sensors are new, clean MAF, change air filter, change plugs... thats what I did when I had the same symptoms.. and oh yeah, floor that m50 of yours... maybe it had too much city driving in it....

[aecs8284]

New plugs, new air filter, cleaned MAF, drove it for 40 miles; no change. All but stalls when stoppped, does not like throttle changes. MAF disconnected, it runs OK. ANy other suggestions? My indie is on vacation for another couple weeks.

[Tiger]

Clean idle control valve... if this still doesn't fix it, it is most likely the MAF is bad. Test the MAF.

[DaveVoorhis]

Check for intake air leaks. The rubber boot between the throttle body and the air filter box is prone to cracks.