DTC P1257 on an L36??? - Page 2 - 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 03-25-2007, 12:25 PM   #11
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Wish I could pop a scan tool on there... Sounds like the TPS or IAC could be part of the problem..

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Old 03-26-2007, 08:30 AM   #12
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What do you mean, it doesn't have this problem when you plug it in overnight?
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Old 03-26-2007, 09:11 AM   #13
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Quote:
Originally Posted by BillBoost37
What do you mean, it doesn't have this problem when you plug it in overnight?
When I use the engine block heater it seems to start up right away and stay running. It hasn't been as bad the last few days since it'* been at least 45*F overnight.
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