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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > Car running rough and can not figure it out !



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      08-06-2020, 10:20 PM   #23
wayman519
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Originally Posted by tsosby20 View Post
These are the codes after I got back from driving with no maf. Plugged back in. I was able to crank it up and drive it with no maf this time. Couldn't really tell if it was still making the issue or not since it just kinda randomly does it. My vanos solenoid are at "0" and "0" now since swapping them and cleaning a week ago
Ok your car ran without maf and you did not notice much difference so we can rule that out for now.

Check camshaft position angle/ vanos angle commanded vs actual. Rev the engine up and down while you are looking at the values and see if the actual is staying close to the commanded. Should be almost instant with a hot engine. If its wavy and bouncing out of sync then you need new vanos solenoids.
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      08-06-2020, 10:30 PM   #24
wayman519
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Usually those solenoids need to be replaced at around 100k miles. Mine were completely shot at 100k.
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