6G Celicas Forums

testing for leak at 3-5 psi wont do much for you. i too was testing with low pressure, but as soon as i started checking at 15psi i started finding a bunch of leaks everywhere. im still having boost issues myself. for some reason i cant got past 11psi on my t3t4 turbo.... =/

this is true, but im afraid to test any higher gonig into the turbo as it may blow the seals. however i do plan on testing the pipes again at higher pressure did u fix ur leak?

Don't worry just test right after the turbo and right before the throttle. I fixed all my leaks but I can't go past 11psi. I think my downpipe might ght be the problem, its kinda crappy.....lol

quick update...

I took off the BOV and replaced it with straight pipe, still no boost, so BOV is fine...

I checked both sides of the turbo wheel spins fine, wastegate flap was closed and not stuck open or hung on anything.

to be SURE no leaks were in my system i took of my intercooler, filled it with water, and saw no leaks.
I took off ic piping at the throttle body, and capped it off on the other end. NO leaks in IC piping (tested pressure at 40psi)


UGH. so i guess it is a bad turbo. TOTALLY PERPLEXED as to WHY when i didnt mess with the damn thing...

I can go two routes:

1. use my other ct20b (which has been sitting for a WHILE and has the hotside separated from the compressor)

2. use my T3/4 and external wastegate (which i would RATHER sell and NOT use)

going to take off the turbo and try to use my ct20b hopefully it sitting for so long with the exhaust wheel out hasn't done anything...

update:
taking the car to a friend's dyno, going to try to determine exactly where the boost leak is coming from before removing the turbo....

Good Luck buddy!
Sucks that its taking so much work to figure it out
will be interested in seeing what eventually is the cause

thanks Dan! I found out what it was, and as I feared, it IS a bad turbo.... I just wanted to be SURE.

took the downpipe off, put it on the dyno at my friend's shop, and held the flap in manually to be sure it was not a bad flap or w/g...

WHY YOU HAZA NO BOOSTA

^ He no bũsta.

This post has been edited by SwissFerdi: Sep 4, 2012 - 4:25 PM

MAN. this is frustrating.... I took the manifold off... checked everything. even used my old manifold... come to find out my old ct20b is clocked and I could not put it on at the time as it was facing downward, and i have no piping for that configuration.

I will have a friend show me how to re clock the turbo back to where it was, and put it in. IDK if the turbo is good as it has been sitting for like 5 years.... but if im still having the problem i will be selling this god damned car along with every piece of upgrade i have for it. or trading it for something.

This post has been edited by easternpiro1: Sep 7, 2012 - 4:01 PM

Dont give in to the frustration mang!

thanks for the encouragement bro, but seriously... this is absolutely ridiculous.... I'll keep pushing... but if this continues it will be in the fs/ft thread lol

http://www.6gc.net/forums/index.php?showto...mp;#entry987070


Fond the leak! lol

"I used cigarillos."

You don't say...

Glad you found the leak, engine at 100% now?

So where was the leak at?

lol dont get too excited there about those cigarillos buddy... I see your avatar! lol




sorry guys, didnt update after I FULLY inspected where the leak was coming from. when i orginally posted that i found it, i saw steady smoke coming from the area of the IC piping routed under the fuse box (right by the wheel well) I didnt have time to jack the car up and look on the underside until the next day when I had another set of hands/eyes to help me out pumping the air in.

Here is what happened:

I jacked it up and saw that the smoke seemed to originally be comign from piping.

upon further inspection I noticed that a coupler (which was in an IMPOSSIBLE PLACE btw) WAS FRAYED ON THE EDGE cool! this is where the leak is coming from i figured...

I placed the IC Piping back on and jacked the car up and asked my gf to hold the air pump onto the vaccum line coming from the BOV.

I saw that smoke was coming from the air filter and not from the coupler like i thought. I felt like an ass... the video posted on here about that smoke test didnt account for covering up the filter and i completely forgot about it!

so next I will cover up the filter area and try again..... If this dosent work I will Unclock my other CT20b and put it on. If my car is STILL not boosting I will be selling it, this is apparently WAY over my head or im missing something.

What was weird was that after all this, when i started the car, two things happened: 1. it idled at 2k 2. my RPM gauge no longer worked (this is after i moved the fuse box to get to the piping) Cam told me that that shouldnt affect my idle because my tach addapter is next to the ECU INSIDE the car.

Im honestly beginning to think this is an electrical issue... but due to my limited Experience I'm not sure how this can be so.


Lagos, thanks for all the advice! I honestly dont know what to do at this point... the most knowledgeable person nearby absolutely hates my car lol, and for all the research and tricks ive tried to fix this problem, im just about out of ideas

It needs less ideas and more of your hands under the hood!

lol thats what Ive been doing! this weekend Im putting the spare ct in, have to un clock it.

ANOTHER update: Ive inspected my turbo, and come to find out there is nothing wrong with it. A friend checked over it and confirmed, and insists that im loosing boost through a crack in a pipe or silicone coupler....

I will take off all IC piping again, and hopefully he can weld some of it to eliminate chances of more foolishness.


I meant to show the video of my wastegate while the car was on the dyno here it is: http://youtu.be/XQ95DchrUV4

whoa, weird looking wastegate... what gen engine is that off of?