After installing MS on my greddy setup I'm not getting boost over 5psi. The limit set on MS is 11psi and I've adjusted the WGA/MBC over and over again, but same result. It gets up to 5psi of boost when cold, but when all warmed up it gets down to 3-4psi only.

I unhooked the WGA hose from MBC and got only 3psi steady. ( I thought it would be at least 7PSI) I have yet to try Joe Perez's way by hooking up the lines to the cold pipes rather than the compressor itself. I am going to though, I'm currently waiting for the JB welds to dry on the barb on the cold pipe.

I have a helper spring on my wastegate, but it doesn't seem to help for ****..

I took off all the pipes to check for leaks; nothing.

I'm still a

 

What's happening when you are getting to 5psi? Is it breaking up (like hitting a rev limiter) or is it just continuing to pull (albeit slowly).

 

Is the wastegate stuck open? Try opening and closing it by hand

 

It's a steady 5PSI, when it gets up to higher RPMs it sounds like the engine about to blow, but it's still picking up speed, but slowly. I initially thought it was the clutch, but it ran fine at 7PSI w/o MS back then. I tried some diagnostics and it seems like the clutch is fine.

It's not stuck open. Even took out the DP to check, it was fine.

 

That's really weird man. If you can't figure it out this week, call me up, well try to figure it out.

 

Haha alright. I'm just trying to figure this thing out so I don't have to bother you

 

What's your wideband say?

 

wot 11-12

 

So I did Joe Perez's way of connecting the MBC to the Cold pipes. Same problem

 

Is this suppose to be loose? I checked the shaft play and it was fine, but then that piece came loose.

 

Yes, the heat shield will move around a bit until you put on the turbine housing.

Does it spin freely? It looks like there's quite a bit of oil on the exhaust side. Does it have so much play that it could twist and bind on either housing?

Does it even have the heat shield on it? It's hard to tell from the pic, your art skills are covering it up.

 

Oh sorry, I was just using those images to be specific. That's not my turbo. My shaft does not have any freeplay and it doesn't hit the housing.

 

How about any questionable couplings? May be a boost leak somewhere? Are you lifting the BOV under boost?

 

Idk. It whistles slightly when letting off the gas @ about 3k+rpm

 

Are you running a BOV?