Acert help no power no fuel mileage

If it would get 5 at that speed I would be happy. Like I said something somewhere is wrong. We have an msx that gets almost 6mpg running right along side this truck it won't pull with the nsx but it doesn't have a fuel temp wire. I dunno anybody want to buy a truck?!?

 

I haven't shimmed the pump fuel psi is around 90 at idle 100 or so at high toms if I'm not mistaken. I'll check again but as far as the small things like boost leaks fuel psi overhead is all good fuel psi might be a couple pounds lower but not enough to hurt it this bad I don't feel like.

 

Just accelerating pullin a grade it's not acting crazy or anything but the local cat mechanic says he's never seen one make that much boost pullin an empty trailer up a grade and very few loaded truck making that much

 

This maybe a dumb question what's CACS?

 

Yea that's what my buddy said that's a cat mechanic it maybe what needs to happen a mile to the gallon could pay for the repair in a week at this rate.