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6.0 Low power, good boost issue
Hello, My 2003 6.0 has low power as soon as it gets above 30mph. It had a oil leak in the high pressure system so i replaced the hpop, j tube and all nipple cups, o rings and injector d rings. It now builds over 3400psi of oil pressure but is still low on power.
It builds up to 29 psi boost. Fuel pressure is 55psi and doesnt change with load. ficm is 48.5 volts. New icp, ipr, and oil cooler. Egr delete. Starts good both hot and cold. Idles well, no smoke of any color at any throttle position. no codes.
I have read in other posts that the high boost and low power could be a turbo vane sticking issue. but this boggles me as if it has high boost should it not give it the fuel to make power. I would think if its making the boost it should make the power?
I thought maybe the catalitic converter was plugged so i cut the exhaust off and still has this issue.
Can anyone let me know if they have had this issue before.