MSD troubles - 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 11-19-2006, 02:04 PM   #11
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Tell your mechanic to make sure it'* not the fuel pressure regulator first before he digs out the fuel pump. One sure sign of a bad FPR is if there is any fuel in the vacuum line leading to the FPR. Also, check fuel pressure at idle, pull the vac line off the FPR and check the pressure. Then turn the car off and watch the pressure. If it bleeds down in a few minutes, that could indicate a bad FPR too, IIRC.
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