now I have multiple misfires?

1998 FORD EXPLORER
150,000 MILES • 5.0L • V8 • 4WD • AUTOMATIC
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TRUEBA
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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
Apr 17, 2026 at 9:32 PM
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STRAILER
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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.
Apr 18, 2026 at 9:21 AM