Quote:
Originally Posted by CapeX5
I had not considered manifold pressure. I will do that, thanks. Where would I tap into for that and what numbers should I be looking for?
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You can tap from the back of the intake manifold (on CCV). I also believe there is another tap on the right side of the throttle blade.
You would look for a wildly fluctuating reading rather than a smooth one.
Here is another trick. Take a long screw driver and place the tip on top of the metal portion of Bank 2 valve cover...... place your ear on the end of the screw driver and listen for the origin of the sound. Listen in the vicinity of each cylinder. If it is the valves, you will absolutely hear it loudly in that area.
Check the for ECM error codes. Sometimes it can tell you if there is problem with vacuum. Not sure x5 has that kind of monitoring. My 2007 vette once broke a valve spring and the manifold pressure guage spoke to my computer and threw a related code.
I would check the oil and oil filter at this point for metal flakes....as someone just suggested.