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Project 1992 BMW 325i
#27
Well, repalced the O2 sensor and it didn't help at all. However, the CEL still reads O2 sensor!

Which leads me to believe that I have a vacuum leak. I read that these cars can sometimes develop leaks at head/pastic intake joint. I'm going to dig in and see how it looks.

A vacuum leak could explane why the CEL states O2 because it is probably ready way out of range if it's getting unmetered air.

I can detect a "woosh" sound from the intake side when the hood is up, but I'm not sure if that's just these cars sound...

Thoughts?
http://www.85xr.com

1985 Merkur XR4Ti Track Car
2013 Ford F-150 FX4 Ecoboost
E46 BMW 330Ci Sport 5spd
1973 Honda CL125S
1985 Honda CX500
2013 Arctic Cat 700 ATV
2017 Onewheel +
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