Hello
I am new to the gas supercharger worl, I have been a diesel tech for 28 years. I have a supercharged 95 Bonneville with a code p1640. Trouble tree leads to a PCM but the car seems to run good. I have been reading on this forum about doing the boost bypass trick and if it works I need a new Bcs. I have been having problems finding the boost bypass trick, even when searching for it though. Anyone that could point me in the right direction would be appreciated.

Thank You

Ernie...remind me what the name for 1640 is please.

Is that Quad Driver B? BCS/Evap Sol/TCC soleniods?

Hello
It is the QDM 1 driver, and I solved the problem today, it was the boost control sensor.

WTG!