ok, looking at your pictures, the first pic, you shouldn't have that lower hose connected to your wastegate solenoid. I just looked at my car with my VAST MBC, and mine is nothing like the way your two pics are showing things..

good luck!!

-Simon

 

In the N75 pic (my 2nd picture), the N75 is at a different angle then in the first picture showing the diagram. The lower hose (from the right) is connected to the compressor housing. The ambient is the top hose in the N75 picture. The bottom part is where it would go to the wastegate solenoid but it is disconnected.

 

I got the same code when I first did mine that you got the lov VAC code. You might want to Pressure test the car and make sure there are no leaks. But in the end it looks (from what I can see in your pics) that you have your set up run much differently than mine. You will love it once you get it right.

 

Your second pic is not the N75 it is a picture of your N249 your first pic is of your N75 and it definitely is connected wrong.

I am not a huge turbo guy but I looked at a VAC dig of the 2.7 and you need to take that dig you have and for get it. Try this take the line from the compressor and connect it to the feed line of the MBC and then take the discharge and connect it to your wast gates. Remembering that your first pic not your second is your N75

Keep us posted

 

I will try what you guys said. About the pictures, when I was talking about them I meant the N75 is the 2nd picture because the diagram is the first picture.

 

Ok, I connected the compressor housing hose to the MBC, skipping the 'T' to the N75. The compressor part of the N75 is now capped off. I also removed that check valve and the vac lines in my last picture alone with the N249. Where the N249 was, I now have the intake manifold connected directly to the bypass valves, with no N249 or one-way check valves in between. Here is what it looks like now:


N75:


Where my N249 was:



However, I am now getting the codes:
P1476- vac pressure too low (had this code since putting in the MBC with this whole thing)
P1136- fuel trim too rich at idle (I think that's what it means.. this code came on after I capped off the compressor end on the N75 and removed the N249)

 

Sorry I guess the first picture would have been the dig.

Your N75 looks good but we can't see what you have done. You need to take a pic far enough back so we can see more of the Vac lines on both the N75 and N249.

Your n249 was hard to diagnose because I could not see what you had hooked up to where. All I saw was a bunch of Vac lines. there is no way to tell where they are coming from or going to. I would hook back up the n249 like you did before. Do the changes one at a time. Because it seems that you may have fixed one issue and caused another.

Where are you located?

 

I will try to get the vac lines pressure tested ASAP. In the mean time, how should my N75 and N249 look? Right now I capped off the wastegeate side and compressor side of the N75 so that the only end that isn't capped off is the ambient end. The N75 is plugged into its harness. The N249 is completely removed. Also, I removed the vac lines near the FPR. I ran the vac line from the intake manifold (by the N249) to that silver metal tube (by the black vaccum cap in the latest N249 picture) that goes to the DVs.

Basically, where the compressor and wastegate were going to the N75, I put in the MBC so it's sort of replacing it except for the ambient still going to the N75. The N249 is completely removed and I took out all extra vac lines so that the vac hose that ran from the intake manifold is now skipping the N249 and running right to the diverter valves.

I am located in Morristown NJ (northern New Jersey).

 

When I connected my MBC, I put it in place of my N75. I assumed that on the N75, the ambient was the longest of the three connectors. I also assumed that the wastegate side was ACROSS from the ambient side and the compressor side was on the top/bottom.. Am I correct or did I run my vac lines incorrectly?

 

Fixed. I ran the N75 so only the ambient went to it and the other two ends were capped off. I ran the compressor and wastegate hoses to the MBC. I put the N249 back in. Problem solved!