P1640 QDM1 HELP - 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 07-10-2005, 04:33 PM   #1
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Default P1640 QDM1 HELP

I have this code and I was just wondering what it could be , boost control solenoid, evap canister, tcc, my car has a high idle sometimes when i start, how would i check to see if its the evap canister?
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Old 07-10-2005, 04:43 PM   #2
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Start the car and put your hand on top of the solenoid and you should feel it clicking. Also check for some vacum leaks, especially around the evap can.

Also check your crounds around the PCM. The QDM'* are realllllll voltage dependent.
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Old 07-10-2005, 07:47 PM   #3
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Trips, you really need to put your year and trim level in your signature.
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Old 07-10-2005, 11:22 PM   #4
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Quote:
Originally Posted by willwren
Trips, you really need to put your year and trim level in your signature.
95 SSEi I thought?
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Old 07-10-2005, 11:45 PM   #5
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it is a 95 ssei
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Old 07-10-2005, 11:55 PM   #6
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put tha info in your sig plz
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