Missing=Spark Plugs and Coils?
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Cross-Country
Joined: Jul 2017
Posts: 83
Likes: 6
Missing=Spark Plugs and Coils?
Hello
I have a 2017 F-250 4x4 with the 6.2 and about 64,000 miles. Recently I’ve had a slight miss on cold starts, usually when damp out. CEL turned on and I got codes for misses on a few cylinders as well as the random miss code. Truck ran great after running for a few minutes.
Since it only has 64K I didn’t think it was spark plugs already. I took it to the dealer and they diagnosed it as Spark Plugs and Coil packs and quoted $2200. For that much I am doing it myself. I’ve done plugs/coils before on other vehicles and didn’t have too much of a problem with it.
My question is the dealer claimed there was a TSB for some revised coil packs which fix this issue. I looked through the NHTSA database and couldn’t find anything for it aside from TSB 18-2188 which involves a no start due to pcm programming leading to fouled plugs. Are you guys aware of a TSB having to do with revised coil packs replacing old one? Also have your 6.2 coil packs been problematic? If not I will probably just replace the plugs first and save $700 on new coil packs
thx!
I have a 2017 F-250 4x4 with the 6.2 and about 64,000 miles. Recently I’ve had a slight miss on cold starts, usually when damp out. CEL turned on and I got codes for misses on a few cylinders as well as the random miss code. Truck ran great after running for a few minutes.
Since it only has 64K I didn’t think it was spark plugs already. I took it to the dealer and they diagnosed it as Spark Plugs and Coil packs and quoted $2200. For that much I am doing it myself. I’ve done plugs/coils before on other vehicles and didn’t have too much of a problem with it.
My question is the dealer claimed there was a TSB for some revised coil packs which fix this issue. I looked through the NHTSA database and couldn’t find anything for it aside from TSB 18-2188 which involves a no start due to pcm programming leading to fouled plugs. Are you guys aware of a TSB having to do with revised coil packs replacing old one? Also have your 6.2 coil packs been problematic? If not I will probably just replace the plugs first and save $700 on new coil packs
thx!
Lead Driver
Joined: Jan 2002
Posts: 8,653
Likes: 4,737
From: Itinerant
I would start with the plugs myself and inspect the wires as you do the plugs. You probably know already but incase not there are 16 plugs. The front lowers can be a pain in the butt. Put some fresh dielectric grease in the wire caps.
Fleet Mechanic
Joined: Mar 2021
Posts: 1,454
Likes: 606
Plugs are probably fine they are 100k plugs I believe, these coil-on-plugs are known to corrode. I bought 2 new Echlin branded from Napa (one of each side because they are mirrored) and rebuilt with the AC Delco rebuild kits ~$10 a kit. I used Grote ultra seal in the coils and on the wires. No issues since
You can also have rough running during fuel blend switch in the seasons until the computer adjusts. Pull your coils and you will likely find corrosion
https://www.ford-trucks.com/forums/1...xperiment.html
You can also have rough running during fuel blend switch in the seasons until the computer adjusts. Pull your coils and you will likely find corrosion
https://www.ford-trucks.com/forums/1...xperiment.html
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