2006 Ford Explorer spark plug #4 consistent replacement

2006 FORD EXPLORER
100,000 MILES • V8 • 4WD • AUTOMATIC
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WILLRUHL
  • MEMBER
  • 1 POST
I was just wondering why this problem consistently reoccurs? I'm sure it could be a few things but having knowledge of what those few things could be would be helpful.

Thank you in advance for your help!
Jan 8, 2015 at 7:30 AM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
it can be a bunch of things best thing here is get a compression check and leak down test on that cylinder see if it may be a something internal or maybe a bad valve seal. it may also be a leaky injector or maybe a bad plug wire
Jan 8, 2015 at 7:42 AM
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