Why does my 2008 Chevy impala jerk while driving on 2008 Chevrolet Impala

The car jerks but smooths out when gas pedal is applied. Bad gas or need plugs?? It has 79000 miles and Chevy says it doesn't need a tune up.

by in Frankfort, KY on June 20, 2011
1 answer
ANSWER by on June 20, 2011
plugs would be a good start as it is time according to the mileage. Roy
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Chevy says not ready or tune up. It has 79000 miles on it.