check engine light blinks while driving

Dave Brocklesby

Asked by Sep 11, 2016 at 11:21 AM about the 1998 Ford F-150

Question type: Maintenance & Repair

Check  engine  light  blinks  while  driving  but  don't  feel  like  it  effects  how  
it's  running , also not  firering  right  on  number  7  cylinder  comes and goes  

2 Answers


A flashing check engine light is telling you the engine is misfiring and damaging the catalytic converter. Since you know something is going on with cylinder number 7 start there. That's most likely what's triggering the check engine light. Are you due for a tune up? HTH. - Jim

Bob Beaman

Sparkplug, plug wire (if equipped) or bad coil on plug (if equipped) are the likely causes. When were the sparkplugs last changed? How many miles on this F-150?

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