Hello as the title says i have a supercharged cobalt,i drove the car a few weeks back and then it sat for about a week. I went to drive the car and when I’d accelerate and get to about 5 lbs of boost the engine starts to break up. I had the codes read and it i had a code for a cam shaft sensor,i replaced that and still have the issue but now i got a loud whine when i revved the car not the normal super charger whine. Any ideas?
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