misfire on 2000 Cadillac DeVille

i changed plugs on car.the car is still running ruff and the service engine is flashing.what will cause this and how do i fix

by in Clementon, NJ on July 11, 2009
1 answer
ANSWER by on July 11, 2009
A "Check Engine Light " that comes on while the car is being driven is a sign the car's computer sees a drivability problem that has increased the emission output of your engine. A "Check Engine Light " that flashes signals a serious problem that needs to be attended to immediately. Your car has a 16 pin diagnostic socket under the dash that stores valuable information in diagnosing the problem. The computer in your car stores codes indicating what are the problem lies and live sensor values and information.
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