Boost is going crazy

[Dert]

So I threw my boost leak tester on today and found I had 1 leak at an intercooler coupler, one at the bov flange and one at throttle body, before checking for leaks my mbc was set at 22 psi, I fixed all the leaks and now all of a sudden its boosting to 30+ (I say plus because the gauge only goes to 30 )
I turned the boost controller all the way down and got same result, I checked the wastegate and it opens fine, I disconnected the mbc and ran stock wastegate pressure and still get same result, any ideas as to wtf is going on? I'm stumped

 

[talonDSMerr]

How did you test your wastegate was opening? Where are you getting the pressure source for the wastegate/mbc?

 

[SpawnedX]

Boost creep.

 

[standard235]

Does it go STRAIGHT to 30psi or does it build up as you near redline?

I can tell a diff between the MBC set at 20psi and the car creeping to 20psi...

 

[toyotagt1]

i just fixed this problem on my car it could be a couple of things first of all is all your vacuum lines good no vacuum leaks and do you have your mbc connected right to your waste gate and your j-pipe and do you have a front mount intercooler?

 

[Dert]

Does it go STRAIGHT to 30psi or does it build up as you near redline?

I can tell a diff between the MBC set at 20psi and the car creeping to 20psi...

Its not boost creep, I've had boost creep before, its a full out bang of 30psi, I tested the wastegate by hooking a compressor up to the wastegate nipple and giving it a blast @15 psi, the actuator arm moves and with the use of a stethascope you can hear the flapper opening and closing, mbc is coming off fmic pipe just after the J-pipe and to the wastegate...like I said before everything was fine before I fixed the boost leaks, boost was hitting 22psi (where I had it set) and staying with no creep at all, the only thing I took off to do the blt was the air intake, I left everything else hooked up, I'm stumped on this as even wastegate pressure is hitting 30+...this is on a ported evo3 with a ported megan racing o2 housing as well...

 

[talonDSMerr]

There is something wrong with your wastegate setup. Exhaust gases aren't bypassing the turbine like they should be. Try pressurizing the intercooler piping (where you are getting your pressure source) with the air compressor and watch if the wastegate still opens. If the pressure source is blocked or if the vacuum line feeding the wastegate is leaking, the wastegate will not open properly.

 

[Dert]

Alright found the culprit, after scratching my head for a while I pulled the turbo for closer inspection, the problem was the nipple on wastegate actuator (where the nipple connects to round part of actuator) had a crack in it at the very bottom, I swapped out actuators tossed the beeotch back in and everything is hunky dory, thanx alot for any insight and ideas that were thrown out there

 

[talonDSMerr]

Leaking pressure source, there you go! Glad to hear you got it figured out!

 

[Dert]

the crack was actually covered by the hose, so I could not see it, although it was covered by the hose it still had enough room for air to squeeze out and cause a problem...crazy dsm's always trying to keep us on our toes!!!