Misfire code on cylinder 4?

Tiny
ALYSHA PEACOCK
  • MEMBER
  • 2008 FORD F-150
  • 5.4L
  • V8
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
Does primary a and primary b ignition coil on cylinder 1 or would it be where I'm getting the misfire code on cylinder 4?
Wednesday, September 11th, 2024 AT 7:58 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 46,907 POSTS
It is common for the spark plugs and ignition coils to go out and cause misfire issues. Here is a video to show you how to change out both the spark plug and ignition coils correctly, I would do all of them if the truck has not had a tune up.

https://youtu.be/E6oier7agkY?si=icKQSyHW_2gMTTTP

The recommended spark plug type for a 2008 Ford F-150 with a 5.4L engine is:

Motorcraft SP-515 (OEM recommended)
Gap: 0.052-0.056 inches (1.32-1.42 mm)

Clear the trouble codes when completed. Check out the images (below). Please let us know what happens.
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Wednesday, September 11th, 2024 AT 4:44 PM

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