Q: Car jerkin at 40 50mph wen i re hit the gas it goes away..but no service lights are on

asked by on

My car jerks around 40 50mph but wen i take my foot off gas n rehit it goes away.. There are no service lights on

My car has 150000 miles.
My car has an automatic transmission.

Mercury
Grand Marquis
V8-4.6L
1997
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