Coil pack questions

[98EXPY 5-0]

I keep reading on here that to determine which coil is bad, you have to have a diagnostic computer hooked up. The HAYNES book however says you can just measure the coils with an ohm meter. Is this accurate?

I just assumed that I had the individual coils, but I just read that not all models had that. So now I'll have to check my motor out and see. 98, 5.4L, XLT.


Also, is a coil pack something that is ok to get from the junk yard? I assume that if I can ohm it out, it would be fine, right?


My EXPED has been running fine, except for the exhaust manifold leak. The other day I took it for an hour drive and while doing 60+ it bucked a few times and seemed to lose power for a second. I got it to where I was going, and it sat for about an hour. On the way home, it bucked a couple more times, but no where near as bad as the first time. I am hoping it's a coil pack, but at $50 a piece, I can't afford to replace them all, or just throw parts at it without determining the actual problem.

 

[98EXPY 5-0]

Apparently, something isn't grounded.

I guess it gos in here somewhere?

 

[lakmflx]

Are you asking about the coils under the black plastic piece that says 5.4 triton? these trucks dont use the old "distributor cap" type ignition anymore.

Pull off the black plastic piece, you will see the coils for each cylinder there.

 

[lakmflx]

In your other pic about something not being grounded, that looks correct.

I would remove the cover piece that says "battery" if i remember correctly in goes in that area. Ill take a peek at my truck later today, i have some engine bay cleaning to do

 

[98EXPY 5-0]

I know it has the individual coils.

Yes please tell where that wire is supposed to hook up.

 

[Catatonic]

It bolts to the intake.......its just a ground wire.
you should be able to see where it came from....it either bolts directly to the intake or it bolts to a bracket on the intake.