boost leak?

[JONSHERER]

my gst wont hold more than 6 pounds. supposed to be 16-18lbs. tore apart the front end and all my piping is connected and there is no clear source were its coming from. My clutch is pretty bad could it be that it slips enough to not put enough load on the engine? what are other common places that could cause this?

 

[josh408]

Depends on your setup. Usually the BOV, injector seals, throttle body, just do a test with some soap mixed with water and spray stuff down.

 

[Total Eclipse]

Definately do a BLT! You will probably be amazed at what you find.

 

[JONSHERER]

Yeah iv got all the piping to the intercooler with a bov. Il try the soap thing. How do I do a boost leak test? I know you can build contraptions but any suggestions?

 

[Mecheng1993]

Nope, you really just have to build the tester. It's really worth it though, trust me. You'll have boost leaks in places you didn't even think they could exist..Lol

And just because your piping is tight doesn't mean there can't be a leak at the couplers as well.

 

[Ludejim]

I just finished doing a boost leak test on my new motor. I Replaced all of the vacuum lines. It Still had leaks at certain places. I used Teflon tape and RTV to fix most issues as well as tightening clamps. I recommend building a boost leak tester and using soapy water to track down your leaks. Proper size vacuum line also makes a world of difference.

 

[JONSHERER]

What's the best way to build one?

 

[92AWDHX40]

[ame=http://www.youtube.com/watch?v=atretf9u-Mc]Boost Leak Tester DIY - YouTube[/ame]

there you gotta love youtube or google.

 

[miguelmcv]

I can't seev what iugrad post, but just buy a flat plug pipe from home depot, the out side diamiter needs to be the same size of the turbo inlet, drill a hole and thread it to install a boost gauge to check the psi you are puting in, then dril another hole and insert a tire valve, this is where you are going to add the air,( like a tire).

Use a lot of soap and spray all around your piping and add air, dont forget to spray all around your vacuum hoses, injectors and throotle bosy.

 

[JONSHERER]

so if i block off the side closest to the intake manifold and presurize the intake side of the turbo, I should be able to put through the same amount of pressure that i run and if theres a leak then i will hear it?

 

[luv2rallye]

Homemade BLTer I made and use (parts from Home Depot): http://www.dsmtuners.com/forums/art...st-how-boostpro-net-tester.html#post152554139

Store bought and good BLT proceedure: http://www.dsmtuners.com/forums/art...-boost-leak-test-how-boostpro-net-tester.html

More proceedure info: http://www.dsmtuners.com/forums/tur...here-were-your-boost-leaks.html#post152437651

 

[Faded95]

As others have said, you'll find leaks! Definately do the test again after you think you've got all the leaks, I found a tiny hole in my metal J-pipe after I fixed the other major leaks.

 

[brownie956]

The above posts are great references and info for boost leak testing, but why not replace your clutch if you know it's bad? Boost leak or bad clutch, either way it's loss of power.

 

[JONSHERER]

fixed it. was a vacuum line not connected to a solenoid. also found my stock throttle body is leaking from the gaskets (which i fixed one) and also were the throttle cable hooks up, that entire assembly leaks air like crazy unless i grab the throttle part were the cable connects and press down on it hard...kind of wierd.

 

[luv2rallye]

that entire assembly leaks air like crazy unless i grab the throttle part were the cable connects and press down on it hard...kind of wierd.

Sure sign of leaking TB shaft seals - need replacing (TB Shaft Seals VFAQ).

 

[Boost 44203]

Did you check that all cuplars are sealed tight?