Now I have multiple misfires?

Tiny
TRUEBA
  • MEMBER
  • 1998 FORD EXPLORER
  • 5.0L
  • V8
  • 4WD
  • AUTOMATIC
  • 150,000 MILES
It was running perfectly fine but I wanted to change spark plugs well I did the drivers side first then I had to run down the street it ran perfect then I changed the passenger side and now I have multiple misfires
Friday, April 17th, 2026 AT 9:32 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 55,469 POSTS
Yes, this can happen when one or more of the spark plugs have been cracked while installing them, did you use a spark plug socket? Spark plugs are fragile so they can be damaged while being installed. I would remove the spark plug and inspect them. Also, I would change out the spark plug wires and possibly the ignition coil pack. Please let me know what you find.
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Saturday, April 18th, 2026 AT 9:21 AM

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