cant boost

[xtreme-elements]

ok so here it is,

i have a 92 galant vr4, 5 speed, awd

head gasket, timing belt, etc replaced, 255 fuel pump, 3" turbo back exhaust, and hacked maf,..... everything else stock

the car runs fine at idle, it boosts to 11 psi when cold, but after the first time i boost it and after it warms up, it runs like crap and i cant even get it to get out of vaccumm,

i replaced the maf, tps, boost controller, plugged the vac lines, ignition module, cam sensor, coil packs, injector box, ecu from another car...

i cant figure out what it is....

a good description of what the car does would be, drive up road, press the gas, then the car acts like i turned the key and shut it off, when i let go of the gas, it starts to idle and run again.. then when i hit the gas again, bam,,, it acts like i shut the key off again....

PLEASE HELP

 

[doctor_shock10]

sounds like fuel cut. id check for boost leaks, fuel pressure, and r u sure its only boosting to 11psi and not higher? oh ya and is your car overheating?

 

[xtreme-elements]

not overheating, already did a boost leak test all good there, and ya boost guage says 11-12 psi, most of the time i cant hit 5 psi tho cause it starts acting up