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i got a PT GT '03 5 speed with 577cc blue injectors, so the problem i'm having is i can get the most 7-8 psi of boost stock which dealer says anywhere from 10-15 psi depends on the car and location here is what i already did :

1. WGA solenoid replaced
2. No major boost leaks
3. WGA replaced to the same one
4. all vacuum lines connected correctly to all solenoids (checked from dealer print out)

and i got DSP loading canned tune 93 octane or diablo tune doesn't help no changes at all same 7-8 psi, tried manually custom tune add +20% boost and +17% fuel at WOT no go same thing.
thought maybe clogged cat big back pressure but once WGA vacuum line removed can spike 25 psi or even more didn't try as afraid to blow the motor. there is more miscellaneous information and videos of system under pressure in this thread ptcrew.com/phpBB2/viewtopic.php?t=29173&postdays=0&postorder=asc&start=0
but mainly all major stuff i got written here

any ideas or suggestions will really help thanks
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