Hi all,
My 2001 F-350 5.4 is running bad at idle. It will usually die after idling for 5 to 10 minutes. It drives fine, just doesn't like to idle.
Some 50:1 mixed gas was put in by mistake 6 months ago or so. Maybe 2 gallons or less. Truck was immediately fueled up to dilute it more. Fuel filter has been replaced as well.
Attached are 4 pictures of some codes I'm getting on my reader as well, but I'm not much of a mechanic and any help explaining these codes and what might need replacing would be greatly appreciated.
Thanks for any help.

 

Vacuum leak somewhere.

 

Start by replacing all the vacuum lines first to eliminate and old cracked hoses.
If its still present then your gonna have to go deeper. After that I would try cleaning the mass air flow sensor.
If its still present after that, then it may be the actual air manifold intake gasket. If its not that at the same time it could be the intake manifold itself, either a crack in the manifold from to many heat cycles, OR a crack right near the thermostat as was the case for myself. Any after market manifolds are garbage for this truck. Only recommend the actual Ford OEM manifold for this.

 

2 stroke mix won't hurt your 5.4L, especially in that low amount.

Check your IAC. It probably needs cleaning.