so im doin a boost leak test right now....i have the homemade tester radiator hose clamps pvc cap and tire valve. when i use my tire inflator the built it psi gauge goes nowhere it sits at zero. i took it off and checked with a tire pressure gauge..nothing. do i just have to let the inflator sit there for like ten minutes or what?? when i press the tire valve air does come out...

 

o looked at the boost gauge but it seems to rise and then wont go past .5 bars....

 

Not getting enough pressure, or it's all leaking out somewhere.

 

yea while it sits at .5 theres a super faint whizz coming from the turbo some where any ideas on what it could be...

 

Yeah, you don't have a good seal or have a huge leak. Find where the noise is coming from.

 

yea my car wont hit full boost anymore. its stock and usually at wot it sits at 1 bar instead of 1.3....

 

Ok, well you obviously have an issue, but it's not necessarily a boost leak. Find the hiss and eliminate it. Also, tell us in exact detail the symptoms you're experiencing - rpm, gear, boost, noises, everything.

 

If it's stock why spend all day f-in with it? just take it to the dealer. Unless you are trying to learn something. That's a different story.

 

well yea this is my first turbo awd and manual car...i wanna learn more about it. if i cant figure it out i can always just take it to the dealer. i had a bov i know it shouldn't have been my first buy but i think it had it adjusted too tight which led me to this problem

 

which BOV do you have?

 

i had the greddy rs but i put the stocker back on.... so the hissing noise is way to faint to pin point and while the compressor is off the boost gauge drops suuuuper slow.

 

Out of interest:
Which BOV? and is it VTA?

 

Yes, purchasing an expensive bov when your IX BOV is better was dumb, but it didn't cause this problem. If you're doing a boost leak test, you should be using a squirt bottle with soapy water - that's how you find the hiss. How else did you plan to find leaks?

What do you mean "and while the compressor is off"? What does that mean?

 

vta makes the loud whisssshhhh noise and releases its air pressure to the atomsphere its a type of bov. i have the recirulation valve which routes the air that makes the loud whiiiisssssh back into the intake intead of into the atomsphere

 

could the my wastegate be making the hissing noise???