No Boost pt.2....MY CAR IS RIGGED!!!

[4BangerV8Killer]

ok so i posted a few weeks ago asking about why my car will not boost. Last night i changed my injector O-rings...and while the fuel rail was pulled out i decided to look around a bit.....my question is where does the vaccume line for the bov lead to normally? Cause mine is tapped straight into the side on the intake manifold where a hole has been drilled. (pic below) IS THIS OK? or does it work....could it be the cause of my ongoin boost leak


Heres a normal intake manifold and you can see how there is a screw or something in place...(which is the same on both sides)

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and heres how its setup on mine

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[4BangerV8Killer]

????

 

[FORMONTOYA]

Could be the problem. Most vacuum ports and fasteners are metric on a DSM. If the previous owner decided to run off this plugged port and use a NPT fitting (on a BSP hole) that was close (but no cigar), then yes, it can leak.

In the picture it sure looks like a lot of thread is sticking out for it to be some type of pipe thread.

 

[92awddsm]

That could very well be the cause of your problems. That is the egr injection port used to recirculate exhaust gass. Even if the port is clean and clear, the reference taken from the port will be unreliable becuse of the port orfice size. Add exhaust pressure to that in such a small area and it might hold the bov open not allowing boost to build. Reconnect the bov line to a port on the intake plenum like it is supposed to be.

 

[4BangerV8Killer]

ok ....im not to keen on the vacumme line placements is there a diagram i can go by just incase any other vaccume hoses are misplaced....and its not the wastegate line its the line that goes on top of the bov....could it be that its keeping the bov open?

 

[1stGenRocks]

yes it can keep the bov open.

 

[92awddsm]

The blue line is from the proper port on the intake to the bov.

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If you dont have a port in the intake manifold at this location, chances are, it is from a 2.0 n/t. All you have to do is drill a hole in the boss cast into the intake, tap it to 1/8" npt and screw in a nipple from home depot. If you need help on that, let me know. I have a n/t intake that I can do the same to and take pictures as I am doing it.

 

[4BangerV8Killer]

guess your right...it doesnt have the nipple there....but the existing vaccume line is tapped into the hole that i showed above.....its on the side...does that work right?

 

[92awddsm]

guess your right...it doesnt have the nipple there....but the existing vaccume line is tapped into the hole that i showed above.....its on the side...does that work right?

No, it doesnt. That hole goes into the egr injection port, not the im plenum. Remove the fitting and plug that hole and never remove it again except for cleaning the egr port.

 

[4BangerV8Killer]

i guess i have the n/t manifold... ..as you can see i dont have either nipples that are supposed to be there....what is the other nipple for...(the one right next to the one that the bov vaccume goes on.)

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[92awddsm]

i guess i have the n/t manifold... ..as you can see i dont have either nipples that are supposed to be there....what is the other nipple for...(the one right next to the one that the bov vaccume goes on.)

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The only port missing from the n/t manifold is for the bov. Your manifold has all of the other ports mine has. As far as the port next to the bov port, I think you are looking at the bolt holes for the stock wiring loom. I have rerouted my wire harness and the other holes are where the stock plastic loom bolted to the im.

 

[4BangerV8Killer]

see i have a turbo mani and it has 2 nipples (see) whats the other for?

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[92awddsm]

The other nipple goes to the fpr. If it is stock, that nipple goes to the fpr solenoid.

 

[4BangerV8Killer]

ok so since the setup i have now is just the bov vaccume line tapped into the side of the mani would that make a difference or is that "right"

 

[92awddsm]

ok so since the setup i have now is just the bov vaccume line tapped into the side of the mani would that make a difference or is that "right"

I dont understand what you are asking.

The right way is to have the pcv hooked to the nipple on the left that points up. The fpr should be hooked to the nipple coming from the plenum on the left. The nipple in the middle coming from the plenum should be hooked to the bov. If you dont have the nipple in the middle, install it and hook the bov to it.

 

[4BangerV8Killer]

ok.....sorry. look at the pictures i first posted...the manifold thats currently installed is a 2.0n/t but the bov vaccume line has been drilled and installed into the side of the manifold...i have it pictured there...and i also have a pic of a stock turbo manifold where the hole is drilled. u can see when its stock there is a screw in there for some reason....idk its on both sides too....so the person took that screw out and put in a nipple and ran line to the bov

 

[92awddsm]

ok.....sorry. look at the pictures i first posted...the manifold thats currently installed is a 2.0n/t but the bov vaccume line has been drilled and installed into the side of the manifold...i have it pictured there...and i also have a pic of a stock turbo manifold where the hole is drilled. u can see when its stock there is a screw in there for some reason....idk its on both sides too....so the person took that screw out and put in a nipple and ran line to the bov

No offense but did you read any of my previous posts? The bov line on your car is tapped into the egr injection port, not the intake plenum. The egr port has pressure variations that would keep the bov open and cause no boost problems. Disconnect your bov line from the egr port, reinstall a plug in the now unused port, and reconnect the bov to a source fron the intake plenum. If you dont want to drill and tap the manifold, t the brake booster line from the rear of the manifold. The way it is now will not work. It can and will damage the bov if it hasnt already.

 

[4BangerV8Killer]

ic thx im just hella tired and at work