NO boost.....URD MK1

[Dimebag]

Hey guys, Finally got my boost gauge installed and we'll, Damnit haha....No boost. Won't go past zero. Vacuum is around 22-23 at idla...WOT is zero aka "0". Checked all connection/cupped for leaks and nothing. Ideas and options? How would I know if there S/C is just done for? I've had to fix tons of crap since I bought and thought it was finally running good. I never truly felt the boost was there in my eyes but I've never ridden in a boosted tacoma before so I don't know. It doesn't smoke like a blown turbo seals lol...I tapped into the hose off the BPV.

 

[blackx-runner]

Bypass valve functioning correctly?

 

[Dimebag]

Yes sir....I actually had to purchase a new one so the one that came with it was FUBAR...I purchased the vortex one that comes with the kits as well. When I give it gas, the PBV functions properly....I never hear the blow through like a true BOV would sound but heard they don't make much noise.....

 

[Dimebag]

I will eventually upgrade too a new setup but really want to get this set up working properly...just because I'm hard headed as hell hahaha

 

[justin13703]

I don't understand how it could be making zero boost. If that pulley is spinning then that sc should be moving air. So either you have a MASSIVE boost leak (which would be easy to hear and throw all kinds of codes), a massive failure of the sc (meaning the pulley is spinning but the impeller isn't) or you either are tapped into a weird vacuum source or the boost gauge is no good.

 

[Dimebag]

How can u tell if the impeller isn't spinning?

 

[justin13703]

Take the belt off and the intake tube and look into the unit and spin it by hand. This is extremely unlikely though. I've never heard of it happening to a rotrex.

 

[Torspd]

Where is your gauge tapped into for its vacuum/boost source? A picture would be most helpful.

 

[Gadget]

Where do you have your boost gauge tapped into?

 

[whippersnapper02]

If you had no boost then your truck would fall flat on it's face with no power.

 

[justin13703]

Yeah I'm willing to bet that the vacuum source is coming from somewhere that isn't seeing boost somehow.

 

[Dimebag]

U can see where I'm tapped into here....wrong location?

 

[Gadget]

OK, keep going. Where does that hose finally connect to?

 

[Torspd]

That just shows the Tee hose and one end of that source hose. Where is the other end of that source hose attached?

 

[Dimebag]

Hope this helps....

 

[Dimebag]

BPV , boost gauge, URD calibration unit all tapped and go into the bigger hose up top as u can see

 

[Gadget]

Where does that large hose that is over the oil filter going to?

 

[Dimebag]

Shows that it goes to the Vacuum Switching Valve

 

[Gadget]

In that third picture above. That hose that you have your hand on, show me exactly where that is connected.

 

[Dimebag]

Gadget, that hose that is in my hand is my boost gauge hose. That is tapped directly into the hose coming off the BPV that goes into the other bigger hose.