Question about 1999 Chevrolet Cavalier

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93 cavalier vibrating

Vibrating when in drive with brake held, does alot better in park and at road speed.why?

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Your probably feeling a rough idle of the engine. need a tune up?

in park the engine is not loaded down, just idling at a low rpm=rough
in drive with brake on you have put some load on motor also at low rpm=rough
in drive on the road engine is at higher rpm, = smoother

generally 4 cylinder motors idle a bit rough, especially if one spark plug is not firing right or fouled or one bad spark plug wire. tune up may fix it. if it is not stumbling real bad or stalling then you can live with it.

Posted on Nov 22, 2008

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