My 2004 F-150 Heritage with the 4.6 was running great until yesterday. Went in the store and left it idling, when I came back out it had died. First time it has ever done this. I started it and it started right up but misses bad. Checked it out and found all 4 cylinders on the drivers side are dead. The check engine light is on and the overdrive off light on the shifter is on. It will start right up and everything else is fine, oil pressure, coolant, etc. Help please!!!

 

What are the codes?

 

It's fine for you to see all 4 cylinders are involved but you must give the codes for our interpretation. There are two different cylinder code groups.
It really does make a difference especially if the transmission is involved.
We need all codes including the transmission.
The two areas are normally not associated with each other except by 12 volt power.
Good luck.

 

Thanks guys, have a buddy gonna come buy and get the codes for me then I'll post them!

 

Issue with coils/harness?

 

Sorry for taking so long to get back, but I finally have the codes. They are, P0755, P0666, P205, P206, P207, P208. Thanks in advance for any help!

 

P0666 indicates that your truck is possessed by the devil and must be burned at the stake.

 

If you look up the codes you will find the injectors for all 4 cylinders on the drivers side are in circuit trouble.
No mystery there for misfire. No fuel no go.
It's likely a harness issue.
Test it out with a voltmeter because all the injectors get there power from the same source.
755 is a transmission solenoid B circuit fault.
666 is a Cruise control On signal error.
Looks like it may be rodent damage because it's all electrical and unusual for 3 different area to be affected at the same time or a main harness plugup close to the PCM.
Good luck.

 

Thanks man, found a man here close somewhat familiar with this and he said the same thing. Taking it to him tomorrow and he's gonna check the harnesses! Thanks again!!

 

Haha, that was my first thought also!!!