28psi is a little low choy that its good to go that high)...should see 32psi with a performance tune. Have you done a boost leak tester to make sure you have no leaks? I think you could also do a exhaust leak tester....and spray some soapy water on the up pipes and look for bubbles. Up pipes should be a rusty redish/brown color. I have a 3" body lift so I can see pretty goodcway back in the back.
Any other miss than a tuner? Exhaust?
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01 F350 7.3 4x4 CC SRW/3.73/315-75-16/Aeroforce Interceptor/BD Thruster II/ Bellowed Up-Pipes/4" turbo back exhaust/CCV Mod/DIY 6637/FPR Shimmed to 65 PSI/TS chip reburned with PHP tunes (Stock, 40T WITH Whsiper tune, 80DD, 100R, 140Ex, 140SS)/Replaced and Cleaned EBPS & Tube 4-6-12/Zoodad mod/Recon smoked cab lights/MM Hubs/Cowl Hood/HPx
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