Hey Ford Techs! 2005 5.4L Ford striped spark plug

[Jeff Lee]

Yes...
Funny thing is, it hasn't run this smooth at idle for a long time. When I had the plugs changed back in August, it was an attempt to get it to smooth out along with injector cleaner, fuel filters, etc.
So my WAG is the plug was bad from day one. I'm already seeing about 1 MPG increase in similar driving conditions.

Where I got hosed is when I took the truck in with 48K on the odometer, just before it ran out of warranty. The Ford dealer service advisor told me there was a recall on the plugs and they would all be changed under the recall. So when I changed the plugs at a little over 100K miles, I thought it was the second set of plugs. Wrong. The plugs pulled out were the originals. So some Ford tech flagged Ford for the hours, probably turned in some plugs that were in his tool box and I went home thinking I was set for another 50,000 + miles.

[sugar1366]

Glad to hear you got it fixed. The NAPA part # that I was refering to was 600-3248. Anyone interested should look it up at NAPAonline.com. You can see a picture of it after you enter the part # in search. The kit is slick and can get you out of a bind in a hurry.

Eddie Bolton

[Greg Reimer 7376]

While not really a Ford guy, I recently have acquired some experience with these things, mostly in Ford Expeditions, F150 and F350 pickups. The 5.4 isn't exactly the hardest pulling thing you ever drove, especially in an F350. We only had one blow out a spark plug, and it went back to the dealer on warranty. I work for the City of Los Angeles Department of General Services, Fleet Services division. What we have are an epidemic of engine misfires caused by antifreeze and water getting on the coils, migrating down the spark plug well, collecting there and shorting out the secondary ignition, especially on the passenger side cylinder bank. This is caused by failure of the connectors on the two heater hoses.Coolant leaks under pressure from these points and drips directly onto the coils. The yellow light comes on, the SCAN tool comes out, and the P0300 Engine Misfire codes are displayed, by cylinder.The first time one of the guys had to tune one up, he was screaming bloody mayhem and murder at it. That's the most difficult to work on truck I ever have seen. I had to replace an engine in a 2003 F350 with a new crate engine, and that got the award in the shop as being the year's nastiest job . There's a secret warranty on the head threads, but they obviously don't want you to know that so they can get paid twice for it. Who else but a dealer??

[Pat Cook]

I have used this kit to repair several 5.4's very easy to use and so far no problems.

http://www.denlorstools.com/home/dt1...to_repair.html