Motorcity muscle
Full Access Members
May want to check/replace fuel filter
2011 Expedition 5.4l 3v P0301 Cylinder 1 Misfire
- Thread starter Digital_Dad
- Start date
-
- Tags
- 2011 5.4l cylinder 1 expedition misfire p0301
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
OP
OP
Digital_Dad
Member
It has come back, we replaced all the spark plugs, all the fuel injectors and one coil pack so far. Today I'm pulling the valve cover to check the roller follower / rocker arms on cylinder 1. I will update, do you have to replace the valve cover gasket if it isn't leaking?
Update: I replaced the left side cylinder 1 intake roller follower only because it had a slight discoloration, it had no play in it but I had already bought one just in case so I used it. Also replaced the valve cover gasket.
Update: I replaced the left side cylinder 1 intake roller follower only because it had a slight discoloration, it had no play in it but I had already bought one just in case so I used it. Also replaced the valve cover gasket.
Last edited:
OP
OP
Digital_Dad
Member
I am trying to do that right now but am not sure I am doing it right. I have the multimeter set to resistance, the coil pack wire is solid purple on one and white with a black stripe on the other. I unplugged the center PCM plug and tested the bottom right pin where the solid purple wire is and get 8.9. Then test the white with black stripe wire to the second row down from the top and third over from left when looking directly at the plug and get nothing, but when I switch to the purple wire at the coil plug the meter reads 24? I'm not understanding how that is even possible. Any help on how to correctly test it?
OP
OP
Digital_Dad
Member
It only has an in tank fuel filter attached to the pump apparently?
Motorcity muscle
Full Access Members
Fuel filter should be on left frame rail under drivers seat
I was talking about if the wire is connected properly, these harnesses get brittle.
I have had problems with the harness like in this video
https://www.youtube.com/watch?v=wMgKZ-AQwhM
OP
OP
Digital_Dad
Member
Unfortunately these have a nice firm click and are not broken, I am a little suspect of the wire right where it meets the plastic though.
OP
OP
Digital_Dad
Member
Right in front of the tank is the evap canister and then the line runs straight up to the fuel rail?
