Help major boost leak and can't find

[ccollick13]

My car has been running in limp mode. when I'm not on the gas i get a reading of 12 vac on my boost gauge and can only boost to 4lb. The idle is rough and randomly when not on the gas it will rise the rpm to about 4k while the vac goes back to normal at 22. I have engine codes p1128,p1136,p0507,p0300,p0301,p0302,p0303,p0304. i have done a boost leak test and i did not find anything so today i removed the few things i have left dealing with boost and vac except for the turbo and exhaust but again i did not find any holes or cracks. Could the problem be the turbo or wastegate but still be able to get a little bit of boost?

[Spectre1130]

How did you perform your boost leak test? Like where did you hook it up? I only ask because it sounds like a vacuum leak issue.

Is your car a DBW or DBC? I know TB alignments are recommended alot but I have a DBC and don't know anything about that.

[ccollick13]

i hooked up an air compressor and tennis ball to the turbo inlet hose and charged the system but did find any thing or hear anything. that why i removed everything dealing with my vac to look over it and everything was good. I'm thinking it is the turbo or wastage but i really don't know much about the mechanics of the turbo so i don't know what could cause a boost leak from inside the turbo or if that is even possible. the other thing i was thinking was maybe my tune needs to be reflashed. My car is a ATW and it is DBW.

[Spectre1130]

Unless your turbo is totally broke-dick you can't really have a boost leak from it.

I don't think it's your wastegate because you have the RPM rise at idle. You can check it though. Just try moving the little wastegate arm. I've seen the spring inside the wastegate fail before.

Let me look up all those codes you posted, and you could also edit your first post to say what each code is so anyone trying to help doesn't have to google each individual code just to see what it means.

EDIT:
P-1128: Bank 1 System too lean
P-1136: Bank 1 System too lean Long Term
P-0507: IAC RPM higher than expected
P-0300: Multiple random misfires
P-0301: Cylinder 1 misfire
P-0302: Cylinder 2 misfire
P-0303: Cylinder 3 misfire
P-0304: Cylinder 4 misfire

[Spectre1130]

Could be faulty IAC or TB alignment.

[ccollick13]

Thank once i get home ill do a tb alignment to see if that will fix the problem