he may not have a boost issue, that is all my truck would do and it builds the same way as mine does, i have no leaks on the boost side, i have no exhaust leaks,
after the intercooler and all the other mods it still builds boost the same as his and i can hit 20 psi if i hold it to 3400, but it is a slow climb and just barely hits that mark just before the limiter, i think a video is in order today before i head out,

 

Joe, the big difference between your truck and his is....his a dog.

Birdoprey, here is a list of items that the repair manual says to confirm for a Lack/Loss of Power:

PRELIMINARY CHECKS

• Perform the following preliminary checks:
  • Confirm brakes are not dragging
  • Confirm transmission and axle fluid levels
  • Confirm transmission and axle tube are not "cooked"
  • Check for engine overheating
  • Check for oil in coolant
  • Check engine oil level
    • Confirm oil change within 8046.5 km (5000 miles), (5632.6 km [ 3500 miles] if severe duty)
    • Check Filter Minder
    • Check MAP sensor hose for holes, blockage, or disconnection. Confirm grey (not black) MAP sensor: F4TF-9S480-AA
    • Check intake manifold system for leaks with soapy water with engine running. Include orange seals, gaskets and fittings
    • Confirm acceptable SAE oil viscosity:
      • 15W-40: above -18°C (0°F)
      • 10W-30: from -23° to +32° C (-10° to 90°F)
      • 5W-30: below 10°C (50°F)
    • Check fuel quality by opening filter drain and cranking engine
    • Confirm proper dipstick part number:
      • Econoline: F5UZ-6750-A (Navistar: 1824405C1)
      • F-Series: F4TZ-6750-E (Navistar: 1824405C1)
  • Check for sufficient clean fuel
  • Check for an intake restriction
  • Check MAP sensor hose
  • Check for proper MAP sensor (grey)
  • Check intake manifold for leaks

 

i'm not saying he doesnt have a problem, i was just referring to the statement that the boost level and the way it builds boost was the problem.....video shortly

 

It could also be weak injectors, on average they need to be rebuilt every 150,000 miles. This could cause the low power issue

 

sorry no vid today, no time, tomarrow i will get it