Not Building Boost *HELP*

[Blitzeclips]

Hey guys my car is not building boost. it's readin 20 vacuum, 25-30 idle oil pressure, and will not build boost. Something (sound like a bov but it's not)still chirps, even at 0 psi apparently. Makes the chirp almost EXACTLY at 0psi too. Like it builds up, then drops at 0. We were thinking maybe the wastegate is mounted the opposite direction of where the flapper opens. So swapping the bracket could be an idea... We turned the boost controller open to set via wastegate actuating but still nothing.

heres what I'm working with..

http://i35.photobucket.com/albums/d162/blitzeclips/turbo install/turboinstallpics023.jpg

From underneath the car...
http://i35.photobucket.com/albums/d162/blitzeclips/turbo install/turboinstallpics027.jpg

http://i35.photobucket.com/albums/d162/blitzeclips/turbo install/turboinstallpics029.jpg

http://i35.photobucket.com/albums/d162/blitzeclips/turbo install/turboinstallpics037.jpg

Please help ASAP I need to drive by Wednesday...

 

[XMasta19]

...can't see your pics at work


Is it, or is it not that bov making that noise??

 

[4UH8ERS]

Can you not just unbolt the downpipe and have your friend watch the wastegate flapper as you accelerate and try to see if your wastegate is opening or stuck open?

 

[Blitzeclips]

Can you not just unbolt the downpipe and have your friend watch the wastegate flapper as you accelerate and try to see if your wastegate is opening or stuck open?

XMASTA, I'm going to assume it is NOT the BOV. I wasn't building boost, therefore I can't see why it WOULD be the BOV...


There is no downpipe on it. I was cruising around a back road to see if I built boost. I don't believe you can build boost by freerevving. On top of that, free reving isn't the greatest thing for your motor..

 

[VelocitàPaola]

Can you not just unbolt the downpipe and have your friend watch the wastegate flapper as you accelerate and try to see if your wastegate is opening or stuck open?

That sounds dangerous...

XMASTA, I'm going to assume it is NOT the BOV. I wasn't building boost, therefore I can't see why it WOULD be the BOV...

The BOV can still vent while you're under vacuum; it operates under the principle of pressure differentials. As long as there is a difference of roughly 7psi between the intake manifold and the BOV, the BOV will still open. The intake tract doesn't necessarily have to be pressurized; the intake manifold can be at 0psi while the IC pipes are -7psi, and the BOV will open.

I'd do what you're already doing. Check the wastegate orientation, then look for boost leaks.

 

[cs82685]

I'd check for exhaust leaks besides at the wastegate too if your exhaust gases found another way out that doesn't involve going through the turbo, your turbo sure isn't gonna spool

 

[DSMcrazy3]

I'd check for exhaust leaks besides at the wastegate too if your exhaust gases found another way out that doesn't involve going through the turbo, your turbo sure isn't gonna spool

He's right. That's the problem I had. When I finished my turbo install I couldn't build boost and I had an open downpipe. Once I got the exhaust finished, the car sounded the same. Come to find out the manifold gasket was toast.(If you didn't replace this when you turbo'd I would guess that is the problem.)

Here's what mine looked like, new compared to old..
http://i7.tinypic.com/258tiy8.jpg

That said, I would get a downpipe on that ASAP. Especially before you drive it again, if you like your cooling system.

 

[4UH8ERS]

You did take the caps off the inlet and outlet of the intercooler right? Lets just say I know someone named X who forgot to take his off and experienced a similar problem.

like everyone else said check for leaks elsewhere as well.

 

[Blitzeclips]

Well guys we ended up modifying the bracket to allow the wastegate to close. The way it was mounted kept the wastegate open all the time. But that worked because it finally built some boost ....

So all we need to finish now is getting the downpipe to fit at the shop, and wire up my o2 sensors...

 

[4UH8ERS]

congrats. Always start at the source .