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2000 Cadillac STS

Engine Performance problem
2000 Cadillac STS V8 Front Wheel Drive Automatic 144114 miles

once i've drivin my car around for awhile in its get real hot I put the car in park and it jerks real hard and my rpms go way up
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Gilmer
February 24, 2010.




Way up, as in around 1500 rpm? Check for a vacuum leak in the intake plenum boot. This is often not visible, it occurs around the bottom side of the boot, it splits. You can also get a check engine light, and lean codes for both banks P0171, and P0174.

Factoryjack
Feb 24, 2010.


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