1998 Ford F-150 Q&A

1998 Ford F-150 Question: how to determine which coil pack is bad.

i know one is bad but not sure which one ??? -
Answer 1
Which engine? -
Comment 1
5.4l -
Comment 2
Replace all coils. You will be glad you did, if you plan to keep the truck! Scanner can find misfire, IF you want to replace just one. -
Answer 2
I would strongly recommend a set of eight as well as goo with an OEM or high quality coil. You could try disconnecting them one at a time until you find the one that does not effect how it runs and know that is the failed one as well. -