99 sle bonnie stalls. - 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 08-30-2009, 02:21 PM   #1
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Default 99 sle bonnie stalls.

99 sle. car starts cold then after a couple minutes idles irratic up and down and stalls. then wont restart. got new pugs,wires,fuel filter,and air filter. fuel pressure is 44 psi. what do i do?
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Old 08-31-2009, 07:36 AM   #2
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Some things to try.........unplug your MAF sensor and see if the car runs any better. If it does than the sensor took a dive. Read this to..https://www.gmforum.com/t278926/

M*** Air Flow sensor



A bad IAC valve will also snuff out a motor when idling. Try tapping on top of the IAC to see if things improve or take a hair dryer and warm up the sensor to trouble shoot it.

Idle Air Control valve

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Old 08-31-2009, 11:33 AM   #3
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I already checked maf and cleaned w/ maf cleaner. i will try checking the iac. thanx!
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