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Originally Posted by Jager
I'm reviewing some of the data I recorded. Can anyone explain why the "camshaft position deviation" is different now (both banks are closer) than before I started this project? The idle is also smoother and a little higher. O2 sensors changed the idle???
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Answer is simple: With the new IMS installed, there is now less "slop" in the cam drive system. The normal cam deviation values are an expression of how far off ideal the shafts are running at idle, and the deviation is caused by wear and mechanical +/- variances, etc. It is also not uncommon for an IMS bearing that is near death to cause the cam deviation values to swing wildly back and forth while the engine is at idle.