help with p0351
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Joined: Aug 2004
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help with p0351
I could use some help here, please... 04 F150 5.4 3v. I bought the truck with 102k on it, it now has 124k. In the morning, when the outside temp is between 30-50, the engine starts and runs fine. When I get to the first red light ( about 1 mile away) within seconds of the engine at idle, engine starts to run rough and CEL. everytime the code is p0351. If I let it sit in the driveway to full warm up... no problem. If I start the truck, shut it off and restart...no problem. It only happens at the cooler temps. I have changed plugs, used motorcraft, nickel antiseize, torqued, etc. Ford changed the coil, I have changed the coil, cleaned MAF. I don't have much hair left...any help would be greatly appreciated. Oh, as soon as I cross the intersection, light stays on, rough running clears up, and runs like a champ for the rest of the day.
John
John
Fleet Mechanic
Joined: Aug 2002
Posts: 1,899
Likes: 29
From: Raleigh USA
P0351 is a coil circuit problem. Could be a couple of things. Could have a loose connection at the #1 coil, poor pin fit in the connector, broken wire somewhere in the harness, poor pin fit at the PCM connector, failing coil, or a failing coil driver in the PCM.
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