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