Bought the the car in August. It's a 09, with gms1 zzp charge pipes. Drove it 30miles and the cel came on scanned it and it came up "p2178" rich at idle bank 1.
Got a boost leak test done and was leaking at the BOV it looked like a cheap knock off one so it got replaced with a brand new Tial BOV. Now after driving around for awhile, a new code popped up "p2261" mechanical bpv something.
The car still has the stock turbo with tan bpv attached but the vacuum line that's running to it isn't hooked up but when the boost leak test was done after the Tial BOV install nothing was leaking. Any advice would be great.

 

You said it's a GMS1 but does it have an aftermarket tune on it too?

No way you could get away with an aftermarket BOV on a GM stock or GMS1 tune.

 

Pretty sure it does.

 

With the gms1 what psi is it usually around? Before the Tial BOV sometimes it would hit 20lbs. Now with the new Tial it holds around 15lbs.

 

GMS1 runs in the 20-23 range mostly.

 

Ok I think people need to start understanding how a bov/bpv work with the vacuum lines. I can garentee u have a boost leak at the stock bpv. U can't just remove the vac line from the bpv or from a bov. They are opened via vac but they are also held closed under boost by the boost pressure. That light spring is in no way able to hold the stock bpv closed under boost by itself, u see, when u let off the gas the solenoid opens letting vacuum through to open the bpv via the bottom line on the solenoid, which in stock form only sees vacuum.when u are under boost the solenoid is close it allows the top line of the solinoid to be active, which only sees boost via the charge pipe, which causes the boost pressure to push the on the bpv holding it closed. Works the same way with a bov. I had a bov that was open at idle due to light spring. When I hit the gas the pressure in the line started going from vac to boost and that boost pushed and held the bov closed. Do not remove the line from the bpv, it will basically make a huge boost leak at the bpv. Just leave the bpv hooked up like it should be, tee another line off ur manifold boost reference and run that to the bov, u will then have ur stock bpv for
Lower boost, and the bov will take over for higher boost. I have done this, works and sounds great. If u don't want to use the bpv, buy a block off plate.

 

Ur car is running the trifecta Ecp tune, it's the only tune that will run a bov without relocating the maf. Ur car is pulling rich codes cause the ecp tune sucks ass and it runs ur fuel trims pretty rich, if u can scan ur stft I can bet they will be in the -10 or more range, to pull a code like that most likely closer to -20 . How do I know? I ran the same tune with the same bov. That tune is ****. Plus there is the boost leak at ur stock bpv. Fixing that may fix ur code but it won't fix ur bad tune. I'd advise u to get someone with trifecta cable to tune u back to stock, get a maf relocate lower cp and relocate the maf, and get an hp tune for the bov, if u don't wanna do that then buy a new upper charge pipe with no bov and again a new tune. I've been in exactly this situation. Don't do a bov if u don't do it right

 

Think the maf is relocated will up load pictures in a few mins when I get out of work thanks for he helpful info. I bought the car line this the only thing replaced so far is this BOV.

 

In sure the previous owner had issues and couldn't figure them out so he sold it. They should have done a little research and would have found their problem pretty quick. Pics would help. If maf is relocated it could be hp tune.

 

This is the new Tial.

 

Ok from what I see I know what he was going for. Now here is how u fix it. Run that line ur holding up that is going to the tial bov back to the stock bov, then run a tee off the line connected to the intake manifold and from the tee run it like it is now, and the left over port on the tee hook up to ur tial bov. And I see u do have a maf relocate so u may be hp tuned. So what I would do is Goto Treadstone preformance website and buy block off plate, and put it in place of the stock bpv on the turbo. But first take a pic of the one that's on there to make sure it isn't already a block off plate. If it's not a block off plate then get one, once u have one then u can just totally disconnect the entire bpv solinoid lines and run a line straight from intake mani to bov . If have to put a plug in ur lower charge pipe to get ride of that vacuum line. But to keep things easy, just hook up the stock bpv again and run that line from tee to bov, it sounds awesome. And it will most likely fix ur lack of boost and ur running rich

 

Ur running rich cause of the huge ass boost leak u r creating by disconnecting the stock bpv like thst

 

Thanks so much will get those things taken care of on Tuesday. I will let you know how things go.

 

Welcome

 

Ok, so I had the vacuum line re routed as mentioned above. Both the p2261 and 2178 codes came up again. Any ideas? Maybe I should get the block off plate and try that?