martinez.anna•1mo agoMost Upvoted

Spent 6 hours chasing an air leak that turned out to be a cracked fuel return line.

I was sure it was the lift pump or injectors on a 7.3 Powerstroke. Ended up being a hairline crack right where the rubber hose meets the steel line, only visible with the engine running and a flashlight. Anyone else waste a whole day on something this stupid?

2 comments

2 Comments

willow_ellis1mo ago

Tbh that's the kind of thing that makes you wanna throw the whole truck away.

charles_chen931mo ago

Ngl that sounds like a 7.3 thing, not a fuel line leak.