Big Ole Boosting problems

[fwdturbobov1996]

I have a slight problem.

I hit 21 psi in first, Shift to second it spikes to 18 then settles down to 10, shift to 3rd spikes to 18 goes down to 10 then creeps up to 13 ish.

Mods
joe p mbc
tdo5h b16g
ported o2 housing
turbo back 3 in with stock looking tip
190 fuel pump
dejon tool uicp
and a aftermarket boost gauge.


Could my mbc have gone to crap? Only started doing this when I tried to turn it up last night. Was wanting to run 15 lbs instead of 13. But would only go to 10. I took the screw out of the mbc and the spring was in there sideways so i straightened it back out, took it out and put it back in. Time for a new mbc?

 

[oldman]

Bypass the mbc and do a test run with the pressure source connected directly to the actuator. If boost holds solid, there's problem with the mbc. If problem persists, problem is some where else. Good luck.