CAR TALK

2000 Cadillac STS

Tiny

Gilmer

February, 24, 2010 AT 2:18 PM

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

FOUND 14749 RELATED QUESTIONS

1 Answer

Tiny

factoryjack

February, 24, 2010 AT 11:38 PM

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.

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