car misfiring on 2000 Lincoln Town Car

i have a 2000 lincoln town car that misfire after the engine has been runing for about 10 to 15 minutes i have change the sparks plug and the car still misfires

Asked by for the 2000 Lincoln Town Car
The coil boots should be replaced when you change the spark plugs. Did you do that?
1 more answer
i do not know