I've got an 05 MR. I've installed and intake, exhaust, bov, forge wastegate, and manual boost controller. When I installed everything but the boost controller I was running stock boost. When I installed the boost controller, I can't even hit 1.0 bar (even if I turn the boost up!). If anyone has any suggestions please let me know because I can't seem to figure it out unless I have a serious leak.

 

You might want to check if you connected the vaccum lines correctly. It will not boost more than .8bar if its hooked up incorrect.

Tom

 

+1 for re-checking vacuum lines.

Check all the vacuum lines for boost solenoid to actuator & air-intake hose...had same problem I had installed vacuum hoses incorrectly.

Do search, you should find the correct way for hoses to be installed so that you can re-check...cool.

 

yeah something is definatly installed wrong, when that happens the car will actually go into a limp mode and will run the amount of psi that you are saying that it is currently running

 

I've checked the vaccum lines a few times and to me everything seems to look right. I have a couple of friends that took a look at it and they can't seem to figure it out either. Do you think a a leak could cause this problem? I'm gonna go double check the hoses and see let you know how it's hooked up.

 

What kind of boost controller?

 

These are the things I did when I was having boost problems

https://www.evolutionm.net/forums/sh...d.php?t=159107

 

right .8 bar is usually around Wastgate pressure, check your lines

 

I have a forge unos mbc. I checked my lines yesterday and one was backwards. After I changed it, I'm running 18 psi. I was gonna turn it some more to see if I can get to 20-21 psi. If I turn the boost controller all the way closed, and I don't get any higher then 18 psi, doesn't that mean I probably have a leak??? Also I searched around and found out that the spring that comes with the forge can only hold about 20-22 psi. Does anyone know for sure if?

 

Now, I have a different problem. If I turn up my mbc, I can get back to stock boost. My forge wastegate is suppose to hold boost to 18psi. If I open the mbc all the way, I am only getting around 11psi. Basically, I can't get up to 20 psi at all. Any clues???