CAR RUNS FINE WHEN COLD, AFTER IT'S FULLY WARMED UP IT MISFIRES - WHAT'S WRONG?
20

Asked by TOMCAT3 Mar 01, 2018 at 10:06 AM about the 1998 Lincoln Mark VIII 2 Dr LSC Coupe

Question type: Maintenance & Repair

ON FREEWAY CAR WAS RUNNING SMOOTHLY, THEN SUDDENLY ENGINE  
BEGAN MISFIRING AND STUMBLING. NOW, WHEN FIRST STARTED AND
ENGINE IS COLD IT RUNS PERFECTLY - THEN ABOUT FIVE MINUTES
LATER WHEN FULLY WARMED UP THIS PROBLEM WILL BEGIN.

1 Answer
20

TOMCAT3 answered 6 years ago

THANX FOR ANSWER: DOUBT CAR NEEDS TUNE UP, UNTIL SUDDEN ONSET OF PROBLEM IT RAN PERFECT AND GOT 28 MPG AT 80 MPH ON FREEWAY; NO CHECK ENGINE LIGHT, AND NO CODES WITH CHEAP OBDII READER. I'M SUSPECTING ONE BAD C.O.P. (CAR IS 1998 4.6L 4V).

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