what is the proper way to do a boost leak test on a galant vr4

[kooter]

So I had an earlier post about turbo not spooling correctly.
I have this tester and am ready to use it.
if I am understanding this correctly that I disconnect the inlet side of the turbo strap this on
here is my question.
don't I need to plug the end that is no longer connected to the turbo ?

 

[ktmrider]

click

Look under the Intake section at the bottom ( Leak Tester ).

VFAQ should be read and re-read, it's the ABC's for our generation vehicles.

 

[kooter]

thank you

 

There for a second I thought that was a Hyundai Genuine boost leak tester.

 

[kooter]

no just a hyundai part I work at a dealership in parts

 

[FlyingEagle]

Make sure you regulate the air pressure being applied. Don't allow full compressor shop air to pressurize those poor tiny oil seals in the intake system. Regulate down to 20 PSI and you will be fine.

 

[kooter]

So just finished
put leak tester on turbo inlet and started with going up to 5 psi needle on the guage went quickly to 5 and dropped steadily back down I would say around one psi a second maybe a little faster but it went up and went down.

definately heard some hissing but it was very faint. spray bottle filled with soapy water sprayed around while.
kept the guage right around the 5 mark, tring to locate the leak. more spraying moved up to between 8 and ten on the guage and found the tiniest of little bubble




right at the top of this tube.

sorry I didn't have my camera to take pictures at the time.

So my question here and the reason for this boost test was that at around 4500 rpm the cars starts to stutter pretty bad. I was told it was a turbo leak. from what I have read and what I can tell the system is holding pressure.

other then that the car runs fine.
any new suggestions?

 

[beaner]

That's typically from bad plugs/wires.

 

[kooter]

plugs and wires have less then 2000 miles. They were done right before I bought the car. I have a new set of plugs and wires from mitsu that I will put on in about two weeks. so we shall see how that goes.currently I only drive the car about 20 miles every other week. trying to do all the repairs before I make it my daily driver.

 

[Dan D]

Worn out tps can also cause a hesitation similar to faulty wires. If you have a logger, check and make sure the throttle position is linear and smooth through the range.

 

[1990ggsxnj]

I was going to say that as well but he states it happens when it is WOT at a specific RPM and goes away if he increases throttle slowly. Sounds like that might rule it out (never completely until it's resolved though).

 

[yeti]

+1 on tps sensor mines bad and is causing studdering at higher rpms..

 

[yeti]

+1 on tps sensor mines bad and is causing studdering at higher rpms..
And if you keep your foot on it slowly its somtimes doesent studder..

 

[dsmtalontsi95]

It looks like you have the breather tube circle. Is the one leaking the large one coming from the valve cover or was it one of the ones on the throtle body? Did you follow the instructions on VFAQ (talking about turning the motor by hand)?