I was with W-Body guy today to get my LIM gasket taken care of. Good news it that the gasket have been already replaced. The oil is clean and there was not a vacuum leak found. The Supercharger is still "twittering" though. Performance is awful when boost is used. We tried everything we could think of
Fuel line pressure (50 psi+)
Remove tuned pcm and installed stock
plugged BBV valve
Check wires/hoses (the coolant overflow hose does need to be replaced)
Checked MAF
After some scanning the car is running lean. Birkboy would be able to explain this better but for the most part the car is not getting enough fuel.
The problem is getting worse though. It used to hang a few seconds when using boost but now it just twitters and barely moved.
Im taking it to a local shop the the fam has been going to for a while tomorrow and let them look at it.
We are thinking that the car needs tuning to cure, but the fact that we put in the stock pcm with no improvement leaves us confused.
Any suggestions?
