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Old 01-03-2013, 08:31 AM
E34Addict E34Addict is offline
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Location: Lebanon
Join Date: May 2012
Posts: 65
Mein Auto: E34 530i '89
Hello Again....
The engine is back to the same hunting problem and apparently this time it is not the Air mass as I repeated the exercise and I unplugged the Air mass plug but the engine kept hunting even after the air mass is disconnected. The hunting this time is severe as the engine almost goes dead then the RPM jumps to around 1.2~1.3. I decided to continue in the list that you posted in the previous post, but I was surprised to find that the Oxygen sensor relay DOES NOT EXIST in the E-Box next to the DME. There are only two relays (Fuel pump and DME). How come is this possible? And what do you suggest?

1- Shall I unplug the oxygen sensor plug from below the engine?
2- If I am to continue with the above check list, how do i disconnect the ECT?
3- How can I check if the ICV is working or not?

P.S: The hunting is only happening when the engine starts approaching normal operating temperature. The fault reader registered two readings:

1- Air Mass
2- Oxygen Sensor Heater

Thanks for your help as usual...

Last edited by E34Addict; 01-03-2013 at 08:33 AM.
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