530 with M60 idle problems ongoing saga.
Newb here, thought Id jump right in.
Recently purchased an E34 530i '95 and love it to bits but the bitch doesnt want to idle when cold. It tries unsuccessfully to idle at about 600 rpm which is its hot idle speed, I think still too low for an auto even warm. I have been through the Bentley and the forums and got a lot of useful info but have ended up in a weird place.
The PO changed the O2 sensors less than 5k ago.
In order I have......
Removed the intake system and cleaned it, the throttle body and ICV checked for leaks etc - some minor improvement for a short time.
Replaced the ICV _ no change.
Ditto the Temp sensor and the air sensor separately - no change.
Now is the weird part, on Sunday in frustration I unplugged the MAF - problem solvered. No engine check light, idles great cold, a little lumpy warm but acceptable and drives fine.
How is this possible? I can understand the cold idle improvement if the MAF is the culprit but why doent it run like **** with no MAF and hot?
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