Problem: car will crank but won't start. Boost gauge is pegged when it wont start, As soon as the boost gauge drops to normal the car will start and run normally, I know that the ecm controls the boost gauge, and how the ecm determines boost is by taking the reading from the vane air flow meter and calculating it with eng rpm and the throttle position sensor reading, Also when the boost gauge peggs the ecm cuts off the fuel injectors to prevent overboost.

Has anyone run into this problem? If so how did you fix it? Any help suggestions will be greatly appreciated!

 

I don't know for sure, but I would venture a guess that it has to be in a sensor somewhere. It must be "thinking" it is overboosting (causing the fuel cut) even when it is not. Let us know what it ends up being.

 

Anyone else have any suggestions. Still no luck on my end.

 

Has it caused the CEL (check engine light) to come on?? If it has, you can get the codes from it. It could be the ECU itself starting to go bad.