P1640 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 04-25-2007, 12:01 AM   #1
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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.

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Old 04-25-2007, 09:40 AM   #2
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Ernie...remind me what the name for 1640 is please.

Is that Quad Driver B? BCS/Evap Sol/TCC soleniods?
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Old 04-25-2007, 08:03 PM   #3
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Hello
It is the QDM 1 driver, and I solved the problem today, it was the boost control sensor.
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Old 04-25-2007, 08:07 PM   #4
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WTG!
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