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

by in Los Angeles, CA on April 03, 2011
2 answers
ANSWER by on April 03, 2011
The coil boots should be replaced when you change the spark plugs. Did you do that?
ANSWER by on August 26, 2013
i do not know
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