2005 6.0 just installed EGR delete. Problem have great power out of gate truck 0 to 50 quick. after 50 slow to increase speed rpms hold at or around 2,8 with foot in throttle. boost climbs right up to 20 to 23 psi factory gage. will not increase after that period checked map sensor checked all exhaust connections no leaks cleaned turbo checked intake and cold air boots and connections. no smoke starts good changed fuel filters went with cheap filter bought on line. changing filters today with proper filters i have not turned offf egr no sct scanner no tunes . i have to go on 900 mile trip in two days pulling 12000lb trailer i have to get this truck right please help