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Boost leak test results

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Nando15v89

Proven Member
58
0
Jan 9, 2013
Whittier, California
So today I did a boost leak test and there were a few leaks the bov was the main one and a ripped hose connected to the bov I fixed both but there's a few I'm stuck on if you guys could help out....### bare with me I'm new to the turbo scene

First thing I noticed is there's nothing connected to this little inlet under the turbos intake
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Second there's a screw capping off a hose on the bov
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Third is this hose connected in the right spot the one connected to the intake and going into the firewall????? And ### does it do?
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Fourth during the leak test this screw on the throttle body was leaking do I tighten it down ?... The big rusty one in the pic

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The boost source under the intake on the turbo can be blocked off, but I like to use it as a boost source for the wastegate or to feed the stock boost controller .

The intake vacuum hose that goes through the firewall Doesn't serve any purpose that I can think of other then measuring vaccuum in the intake. If you have a boost gauge that doesn't read any positive pressure this is probably used as your source and should be corrected by using a source after the turbo.

The Throttle body screw has an o-ring underneath it (search for BISS, base idle set screw). If you adjust the screw it will change your idle. I believe the vacuum line should feed the stock boost controller, if it is still used.
 
Picture 1, that's your boost source should be a line going to the wastegate or a manual boost controller, or boost source like from ic pipe
Picture 2, take out that screw.
Pucture 3, that line should be connected to your evap purge valve under the battery tray
Picture 4, order new isc screw from STM comes with o-ring and plug and new screw.
 
So for picture 1 ## saying I can block it off?

And pic two I should take out the screw and leave it open?

This is installed inside the car but no clue how to use it

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The check engine is bringing up a po110
 
For pic 1, find out if you have a mbc or a boost source off of your intercooler piping. If you have neither see if yiu have an internal or external wastegate. Or take more pictures so we can see more of what you got. But you shoukd not leave it unconnected.
Pic2 yes just take out the screw and leave it open it is not important. All that oipe does is help the bov open but its unneeded.

That new pic is a turbo timer, I dont use it and I know nothing about them.

air temp circuit malfunction -po110 cel

Check your MAS wiring-
the MAS connector and wires can become very brittle from the heat.
 
That is a Greddy Profec B Electronic boost controller. Basically hooks up to your wastegate lines to control when it opens (sets max boost). Although it's an older style, if it still works I'd definitely look into installing it correctly. Those things aren't cheap and provide great, on-the-fly- control of your boost.

EDIT: Also, you're going to want to run a boost gauge of some sort to verify actual boost pressures if you install that. The Zeitronix ZT-2 Monitors WB02 and boost along with EGT all in one digital display if you don't already have another unit. Just a first-hand recommendation.
 
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Few more pics so u guys can see
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And I do have a boost gauge
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In pic 3 there should be a nipple on that wastegate run a vac line from it to the one on the turbo.
Also get rid of that catch can and just run the tube from your valve cover to your intake pipe.

Also recurculate you bov¡
 
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You're catch can is wrong. It's got a breather filter on it AND is connected to the intake pipe. I bet that thing idles like shit right now. The little vacuum hose not connected to anything that's off the intake pipe, cap that off.
/ run it to the profec if it isn"t. Then remove the filter from your oil catch can and cap that line. That should greatly improve things. Plug that hole on the turbo, that's a big ol' boost leak, and then figure out if your Profec-B works.
 
In pic 3 there should be a nipple on that wastegate run a vac line from it to the one on the turbo.
Also get rid of that catch can and just run the tube from your valve cover to your intake pipe.

Also recurculate you bov¡

Yeah your catch can is plumbed in wrong, even if it was mounted correctly it wouldn't be effective.

Read through this is you want to understand the pcv system and why yours is incorrect.

http://http://www.dsmtuners.com/forums/articles-engine-fuel/366890-4g63t-pcv-system.html
 
So I should completely remove that oil catch can? I was wondering ### it does?

The car idles kinda high like 1500rpm

I'm kinda confused still with what I'm suppose to do with pic 3 bare with me guys I'm trying to learn all this stuff on the spot.... is there a picture anywhere that shows how all my vacuum hoses are suppose to be connected that would help me out a lot

I also want to recirculate my bov where could I find the tubing?
 
Yea just take it all the way out and run 1 tube from the valve cover to the intake. Same spot its connected now but yiu want to remove the catch can.

For the turbo the nipple in your first post put a vacuum line on it then run it to the waste gate, (post #7 pic 3) this will make it so you are only running on wastegate pressure. Which is fine for now :) Maintenance first my friend ;)

I used some. Radiator hose and cut it to length to recurculate mine. You will also need 2 hose clamps to secure it.
 
Impressed with the amount of knowledge and no bullshit in this thread.

Based off the pics i think all your problems so far have been addressed so no point in me making a post saying that your engine bay is a mess :p LOL
 
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