Code P0300 Random Misfires

[jbreeder]

Ok. Since I haven't found A Ford Commercial Dealership to help, I need input.

First trip flat towing, I get a yellow service engine light. Happens during high RPM climbing or braking on hills. (>4000 RPM)

6.8 liter Ford Triton V10 with 11,000 miles.

Changed air filter, ran Sea Foam. Then Lucas fuel additive. Did not help.

Can avid the code by staying at lower RPMs.

Any clues?

[Pete'sMH]

Do you have a code reader? They’re cheap on Amazon and should be able to help you figure it out.

[Beau388]

Originally Posted by jbreeder

Ok. Since I haven't found A Ford Commercial Dealership to help, I need input.

First trip flat towing, I get a yellow service engine light. Happens during high RPM climbing or braking on hills. (>4000 RPM)

6.8 liter Ford Triton V10 with 11,000 miles.

Changed air filter, ran Sea Foam. Then Lucas fuel additive. Did not help.

Can avid the code by staying at lower RPMs.

Any clues?

Since it is a low mileage engine - I would guess a vacuum leak, a loose ignition wire or low fuel pressure.