I took my first long trip in my 2006 since I purchased it in October and installed my Quad Adrenaline w/ pulse (so I have fuel pressure gauge).

After an hour or so of constant highway driving, the fuel pressure started slowly increasing from ~6psi cruising, a few psi every couple minutes until it maxed out the fuel sender at 100psi. Rail pressure stayed the same and I didn't notice any performance change and/or obvious change in fuel economy.

I remember seeing on someone's post that the fuel canister won't hold in the fuel over 33psi, which makes me think I wasn't really seeing 100psi.

The fuel pressure went back to normal after a stretch of stop and go driving one time, and after turning off the truck another.

I tried searching, but any search that includes "fuel" just crashes the search feature.

Thoughts?

Thanks,

David

PS I still have the stock in-tank lift pump and about 4k miles of the fuel filter.

 

Sounds like your psi sender or gauge is going out.

 

yeah id have to say the sender is going out diesel eats these things!