Could be cause by a Bad:
Plugs, wires, distributor cap, rotor, plugged air filter, fuel filter,
timing off, very worn timing chain, low compression, burnt or leaking
valves, worn cam lobe, plugged cat or exhaust, defective fuel pump,
water in fuel, transmission malfunction/failure, seizing mechanical
components (water pump, alternator, air pump, power steering pump, a/c
pump) excessive carbon in the combustion chamber causing pre-ignition.
or any number of other issues.
What is the condition of the car? What state/province was the car
manufactured for? When was it last tuned up? Is it the original
engine? What kind of mileage have you got on it? What is the
compression in the cylinders, What is your vacuum reading? Is your
vacuum reading steady? What transmission is in it? Is this a
recent onset or has it been doing this for quite a while? Have you
just purchased the car? Have all the recall's been done (you'd be
surprised at the # of vehicles that have yet to get their recalls
The more accurate the information provided here the better our
estimation of the problem.
PS If you recently drove a tweaked Impala SS as your comparison
vehicle what you might be experiencing is the way the car normally
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