New Turbo No Boost

[dsmnthamakin]

Hey guys im stuck. I recently Purchased a super 20g turbo from e-bay because the waste gate actuator arm on my stock turbo rusted and broke off, causing my car not to boost. So i decided to upgrade. when i got my new turbo it would not produce any boost, all my vacuum lines are good, checked my piping to the front mount, i also tried hooking my MBC to try and change it but it did nothing. I checked the waste gate actuator and it seemed okay, so i thought maybe there is something internal on the turbo. I sent it back got it warrantied. Now i just installed my new one and still have nothing. plenty of vaccuum but still no boost i just Bent all new Piping for my front mount. i work at a shop so i have access to All-Data to do most checks but i am out of ideas. i have done all the basic checks except a boost leak test. but i figured since i just made all new piping that would kind of eliminate that right? Could there be something stuck in my intake manifold no letting it boost. because my BOV does not vent like it is supposed to, it still releases air but not the high pitch it would do under normal boost. this is my setup if it helps.
90 GSX
3in Turbo back exhaust
Stock 2.0 Block
GM MAF Translator ( so i can vent my HKS Ssqv)
Apexi Safc
Aem Uego
MBC (not hooked up right now just till i figure out whats wrong)
Front Mount (with 2.5 piping)
Walbro 255lph
Any help would be apprecitaed. I tried to find other forums but nothing that pertains to what i have.

 

[jrohner]

14b's aren't actually too bad for power if you up the boost to 20-21. My talon (awd automatic) is pretty much stock - 14B, 3" exhaust, injectors, tune for E85. It feels slow at anything less than 20 psi.

 

[darkhorizon]

Your wastegate is getting stuck open, or is getting blown open... Even a small leak around the internal gate will mean ZERO boost.

 

[dsmnthamakin]

i sold the turbo to some kid with an srt 4 $600.00 i said screw it. I also had the actuator tight to make sure it was not leaking but i don't care any more imma save for a big turbo!!