Hello folks, 1992 325is automatic with about 100k miles, 2nd owner.
Im having 2 problems id like to fix right away.
First problem is a surging idle, sporadic, and slight backfires when accelerating or idling.
Up until a few days ago I didnt have any CEL so I searched the forums to get some ideas. Finally yesterday my CEL came on and (with some effort) managed to read 1221 code (O2 sensor).
So im off to replace the pre-catalyst O2 sensor. From reading the forums it sounds like O2 sensor is a big culprit on this engine.
Okay the second problem is the A/C (i think) keeps clicking on and off every few minutes, when idle, with a slight hissing sound too when it happens. I dont even have the AC turned on. What the hell is this?
Someone suggested that this was normal because the BMW wants to keep the AC ready "just in case" you want to use it right away. hehe this doesnt sound plausible to me.
Thanks in advance for any ideas.