10 PSI Maximum! Help!

[Pro-Fab]

OK I am leaving for the lake later today na dI am pulling a boat so hopefully I can have full boost to tow the boat. so I have only had 10 PSI boost in 5th gear pulling a hill the rest of the time I only get like 5-6 PSI TUrbo shaft play is minimal, and boost leeks are not present. I have unplugged the EBPV, and I am getting plenty of fuel. I just installed a 3" down pipe and there is no change in boost. My Isspro boost gauge is tapped into the map sensor line, I even get the same readings from my auto enginuity for boost pressure. There are no codes except for an EBPV code because the sesor plug broke off the sensor. But this should not prevent it from boosting higher than 10 PSI (5-6 psi normally) I should also add that the boos build up is really slow. with the Down pipe it will start boosting at about 2000 RPM and wont reach full boost until 3000-3200 RPM. this is the only Powerstroke I have ever driven so I cant compare to another powerstroke. how fast should it build boost and what else can I check.

[Maintain]

Boost leak or Exhaust leak for sure, if the turbo isn't toast.

[Pro-Fab]

not an exhaust leak, or a boost leak. I would say its electrical because it has decent response now after fixing a hp fuel line the response is much better but the boost still only hits 10 PSI and levels out in a hurry.

[flyin hawaiian]

well that guy is right.check donuts on up pipes.is turbo loose? try to move it.then get soap and water and spray boost tubes.see if there is bubbles

[Pro-Fab]

I have tested for boost leaks and there is no soot coming from the up pipes. + I put new donuts on the up pipes when i rebuilt the engine.

[flyin hawaiian]

do you have fuel presure? do you have a chip in this truck?try take it out and run it and see if any change.

[dieseldan2005]

Honestly Thats all the more i really boost unless i have my camper on and i'm towing my boat. My engine is stock (no chip or tuner), but i do have 4 inch exhaust and an AFE intake. Sometimes i will only show 2lbs just cruising 55 on the highway empty. My truck feels like it has plenty of power and turbo sounds just fine. So i wouldn't think your too far off without a chip.

[broncrider]

with out the chip in mine ill run about 10psi at 2200/60mph but and WOT i can reach 20psi

[nic0084]

Originally Posted by broncrider

with out the chip in mine ill run about 10psi at 2200/60mph but and WOT i can reach 20psi

10 psi stock going 60mph/2200rpm seems pretty high for just cruising... and that would mean horrible highway mpg.

[nic0084]

Originally Posted by Pro-Fab

I have tested for boost leaks and there is no soot coming from the up pipes. + I put new donuts on the up pipes when i rebuilt the engine.

Like maintain said, either a good leak somewhere, either on your engine or boost gauge line... or a shot turbo. What does your compressor wheel look like?