2008 f150 xl 4.2
#1
2008 f150 xl 4.2
I have a 2008 F150 XL 4.2, I got a check engine light and rough running truck all of a sudden. Error Code for #3 cycle plug. Replaced plug still running rough but no check engine light. Truck knocks,
#2
Mark
iTrader: (1)
Try the coil on #3 or if you want to troubleshoot , swap a coil and see if the code follows.
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ChiefBlue (10-24-2016)
#4
Alright, I appreciate the information. The 4.2L has a coil pack, is there a way to test the coil pack ? Also, I replace plugs and wires today idle is smooth in park but in Reverse or Drive the truck bogs down and runs poorly. Shaking when taking on the gas to speed up. I am lost
#5
Moderator
As stated swap the coil to a different plug and see if the error code follows to the new plug or stays on the same plug. That can tell you if its the coil or something else specific to that cylinder.
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ChiefBlue (10-26-2016)
#6
Senior Member
You cannot swap coils around on a 4.2 - It is a single coil with plug wires.
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BadFish523 (10-25-2016)
#7
Moderator
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#8
Senior Member
Alright, I appreciate the information. The 4.2L has a coil pack, is there a way to test the coil pack ? Also, I replace plugs and wires today idle is smooth in park but in Reverse or Drive the truck bogs down and runs poorly. Shaking when taking on the gas to speed up. I am lost
See if this link will help
http://easyautodiagnostics.com/ford/...he-coil-pack-1
#9
I truly appreciate all the feedback for all of you. I did plugs and wires first nothing changed, I replaced the coil pack problem solved. So my 2008 with 175k miles on it is running good.
#10
See if this link will help
http://easyautodiagnostics.com/ford/...he-coil-pack-1
http://easyautodiagnostics.com/ford/...he-coil-pack-1
My truck wasn’t firing on the middle coils. Turns out the coil wasn’t getting the signal to the coil and then not firing cylinders 2 and 6. Fortunately, I had purchased the extended warranty when I got the truck six months ago.