Mechanics

CHEVY MY MPH NEEDLE JUMPS WHEN CAR IS STOPPED

2006 Chevrolet Cobalt

Engine Performance problem
2006 Chevy Cobalt 4 cyl Front Wheel Drive Automatic 125000 miles

My Mph needle jumps when car is sitting still. If the car is in park and I rock back and forth inside the car the needle will begin to jump. Whenever I accelerate from a stopped position and the needle is jumping the car jerks and the steering wheel is hard to turn. HELP
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Cookalishis
June 19, 2010.




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