I have a 2000 Buick Regal 3800, 80,000 miles?

b_rosenberry

New member
that runs alot better when its cold, actually runs great. But when it warms up to operation temperature, it hesitates, misfires and bucks under moderate acceleration. Check engine light is NOT lit, plugs, wires, fuel filter are new, has been doing this for a year. Transmission also shifts fine, so I know its its not that. Any ideas?
 
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