Hello everyone, I've got a 97 f150 that has randomly started missing over the last month. It has started to get more frequent and codes are showing a misfire on both cylinder 1 and 8. Both of these cylinders run off the same coil pack. I'm thinking its the coil, what do you guys think? The plugs and wires, motocraft, have about 3k on them and the truck runs great otherwise. I just don't know how common a coil would cause this or if they would act intermittent like this.

Thank you!

 

I'd take the coil packs off and swap them side to side to see if the problem follows...................

 

It wasy understanding that #1 was passenger side and #8 is driver side.

Part 1 -How to Test the 2 Coil Packs (Ford 4.6L, 5.4L)

 

That's correct. Cylinder #1 is the front cylinder on the passenger side and #8 is the rear cylinder on the driver's side.

 

Ya I knew which cylinders 1 and 8 were, I just initially thought they were on the same coil pack. I retraced them and that's not the case.
Thanks nojoke327, that article helped. I did find a bad wire on number 8, replaced it and its running fine. Not sure why that would have caused a misfire code for number 1 though. I reset the codes and will see if it acts up again.
Thanks

 

Glad you figured it out. I had a code for cylinder 4 and 4 was fine but 2 and 8 were dead. Still trying to figure that one out