Bruce3966

Pulled the PCM and that passenger rear plug and coil was easy--done! Now for a test drive and see if that major miss fire at times is gone between roughly 40-55mph. That was only on a gradual acceleration. Hope it's gone!

Miss fire is gone, truck runs quite a bit better & smoother. Now time to do a tranny fluid and filter change.

4.6owner

What plugs did you use? I would use either the updated motorcraft or the autolite versions. Also a small dab of anti-seize on the barrel of the plug (not the threads) will make them come out with no issues next time. Also stay away from anything not Ford COP's. I have tried them all with my mustang and none of them are as good or last as long as the factory ones.

Bruce3966

I used the Motorcraft and did use Motorcraft Nickel anti-seize on the barrels with a small dab on the first 3 threads (did not go all the way up). I didn't have a choice but to go buy ACCEL Coils locally. The original ones I ordered were wrong (by the seller) and I started this yesterday and need the truck tomorrow. We'll see how long the ACCEL's will last.

4.6owner

Yeah if you are in a tight spot they will probably be fine for now.

08silverbullet

I just changed all 8 coils today. I used msd street fire coils smoothed the idle out and got rid of my 40-50mph miss also they had excellent reviews plus it's msd so a little better than accel and for $150 for all 8 I figured why not

Bruce3966

Ya so far so good even though I only went for a 50 miles drive but so much smoother and a tad more power I think.

HeathMc

I think a lot of people who have problems with aftermarket coils cause their on troubles. It's my understanding that as plugs go bad the computer notices and starts to throw more power to the coils to keep everything running smooth. As this happens and the plugs go unchanged then the coil pack eventually burns out. So people replace the symptom which is the bad coil by replacing it. But the problem was the plug. Therefore the computer continues to throw the power which continues to burn coils. I used the coils from Amazon which were less than 100 for all 8. Changed plugs and cool overs and haven't had any trouble at all. So if I can get 50k out of the plugs/coils then I consider myself to be well ahead. All 8 of my coils cost less than one motorcraft. Just my understanding from researching the problems. Here is the link for the coil packs I used.

http://www.amazon.com/gp/aw/d/B00YAV...bYL&ref=plSrch

Hootsworth

X2 on pulling the PCM, however; I actually left the bracket on and used it as a leverage point when pulling the #8 plug from my engine.

techrep

iTrader: (1)

#8 would be on the drivers side.. ECM is on the passenger side