sputtering or missing? on 1991 Chevrolet Lumina

My Lumina Euro has started acting up.It starts ok but will start acting like a cylinder is not firing or something.While idling there is a vibration and it sounds like, duh,duh,duh,duh,duh,duh(if that makes any sense) and also when accelerating.While accelerating it is slow getting up to speed and still the duh,duh,duh,duh,duh,only faster.Then all of a sudden it just starts running great. Lots of power. When I slow down a lot or come to a stop it starts the same process all over again. The following parts are new. Throttle position sensor,idle air control valve,oxygen sensor,fuel pump,fuel filter,map sensor,egr valve. I do not think it is any of these. Anybody have any ideas on this?

by in Salisbury, MD on March 21, 2009
1 answer
ANSWER by on March 24, 2009
It sounds like you may have an engine misfire. This could be caused by the ignition system - plugs, wires, ignition coil, or ignition module. A misfire can also be caused by a faulty fuel injector. I would recommend to get the car into a good repair shop to find out exactly what the porblem is before trying any more parts.
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