02 f150 coil

Asked by Hollo91 Aug 02, 2018 at 08:20 AM about the 2002 Ford F-150 XLT Crew Cab 4WD SB

Question type: Maintenance & Repair

My 02 f150 5.4 Triton started missing, I put it on a
computer and it says all 8 of my coils are bad. I had
replaced the 1,3,7 about 4 or months earlier. What could be
the problem here?

1 Answer

73,480

Did you change the boots along with the coil. If the boots are cracked, they'll short. Check the resistance on the coil. Should be about 1.8 or so, but check the specs to make sure. If the coil check alright, remove the boot, remove the spring, spray electrical contact cleaner inside the hole for the spring and clean. Put a little dialectric grease inside. Let dry and reinstall.

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