I have a 2001 F150 SCREW with 135,000 miles. Today I just replaced my third coil. So far I have replaced the coils on cylinders 5 (sometime in 2003), 6 (this June), and 7 (today). The service manager of the local dealership says I should expect these kinds of failures given the mileage, but also says that I may or may not have to replace any more in the lifetime of the truck, it "just depends". I asked if replacing the boots or taking extra precautions to keep moisture away from the engine was warranted, he said "No, it's more a problem with buildup with heat in the engine compartment". Sounds like BS to me, seems like Ford should have been able to design for the expected heat environment.
I note from searching this forum a fair number of posts regarding replacement of COP's, but I can't tell from these posts if anyone thinks this is a result of poor design and/or faulty components, or if everyone accepts the frequency of coils needing replacement as just one of those things that comes with the territory. I'd like to know what the community thinks...
Also, has anyone else complained to Ford and gotten any kind of redress??
Many report that not using original Motorcraft plugs makes their motors miss. Sometimes only on one cylinder at a time - so it looks like a COP problem. So, replace the COP, and the miss goes away. However, the real problem was the plug.
Just throwing that out there
- art k. - Moderator for the Superduty, V10, 6.2L and FE forums
'13 Taurus SHO 3.5L Ecoboost w/Perf Pkg
'01 F250SD SC SB XLT V10 4x4 Volant CAI Hedman headers 5-star custom tunes on SCT X3
'97 Cougar XR7 30th Anniv Edition 4.6L
'74 F250 Highboy FE390 deceased! I've been wrong before, I'll be wrong again. Just wait and see. ®
Well at that kind of mileage all boots should be replaced and make sure dielectric grease is used on new ones.If you look at one of the coils that you replaced what was the ohms measurement of it.I bet you would see a open or a very low resistance.
Inside the coil is a capacitor that goes bad.(high heat)this cause the misfire.
You should be thankful you haven't had a plug blow out.
Because when they blow out the wreck the threads in the head plus destroy the cop.
Chk all your boots
__________________ " All levers like real trucks should be!" "Cool enough for me!" " BSEG CLUB"10 Strokin and 4 Smokin!
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.