my tachometer needle is jumping

2002 CHEVROLET CAVALIER
85,040 MILES
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COLVINCHASTITY
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i have a 2002 cavalier with a 2.2..the rpm needle jumps a little but I dont know if its the throttle body or the iac valve. I havent tried anything was going to go to auto zone and have them hook it up to computer
Jan 4, 2012 at 7:11 PM
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