well i decided to take my car out for a spin... I just pieced together a kit... anyways... my boost gauge is reading 0 even when i put the gas pedal to the floor... I thinK i got a really big boost leak but I can't find it.... retightened every coupler that I have and it still won't spool...turbine spins when its idling but won't spool when I mash on the gas... whats wrong here.... thanks Mike...

Setup:
Stock block b16a2 with cm stage 2 clutch in a 93 EX coupe
t3/t4 50trim .63ar
precision 350 intercooler
50mm bov
550 injectors
chipped p28
open dp
skunk2 IM
ramhorn manifold
38mm tial wastegate...etc.

the guy I bought the wastegate from said that it's got a .5 bar spring in it... so it should be boosting to around 7.25 psi... but like I said above... gauge says zero..


Modified by slowhonduh93 at 2:32 AM 7/3/2007

 

If the turbo doesn't spin, it's junk. Are the bearings coked up? Can you spin the wheels by hand?

 

Poor a little bit of Crisco vegetable oil into the compressor and turbine housing. Everything will be fine.

 

bump this

 

Did you just get the car running? Or did it just now stop making boost?

The turbo spools at idle but you don't build any boost? Was the turbo new? Are you positive that its good?


Is the WG stuck open? Does it even have a spring in it?

 

Is the WG stuck open? Does it even have a spring in it?

Who needs a wastegate that has a spring in it?

 

yeah... it was the first time I took it out... and the turbine spins at idle but doesn't boost when I mash on the gas... also... Im going to have to take the wastegate apart and see if there is a spring in it...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RudeLude &raquo;</TD></TR><TR><TD CLASS="quote">

Who needs a wastegate that has a spring in it?</TD></TR></TABLE>

Are you serious?


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by slowhonduh93 &raquo;</TD></TR><TR><TD CLASS="quote">yeah... it was the first time I took it out... and the turbine spins at idle but doesn't boost when I mash on the gas... also... Im going to have to take the wastegate apart and see if there is a spring in it... </TD></TR></TABLE>

Mine as well check. Does the WG seat properly?

 

[QUOTE=90sedan]

Are you serious?


I most certainly am not.

 

it sure sounds like the WG is wipe open. Take it off and see if the valve is stuck open or has no resistance behind it

 

yeah... will take it off here soon.. will update when done.. thanks guys

 

be sure when you take it apart to hold it down so the bolts dont strip the holes, or you have to drill n tap new ones. Also when your putting the cap back on be careful not to pinch your diaphragm.

 

so... i took the wastegate apart and its got a big red spring in it... so atleast I know that its got one in there...

 

you do have the metal spacer/washer thats seat on the bottom of the wastegate.
between the WG and WG flange......i know i feel dum asking, but im tryna help

 

Like "thepariah25" just said, make sure that the valve seat is in there.

If it is not, the valve will not close all the way. When you look at the WG the bottom that connects to the manifold should have a metal ring inside it that sits flush in there.

I had a tial 35mm wg that i bought from a user on here. I couldn't figure out why it would not close all the way. Turned out that they put a 38mm valve seat in it instead of the 35mm. I don't think this is the case for your problem, but it was rather annoying trying to figure that out haha.

 

yes, the washer/spacer was there... still trying to figure it out why it wont boost... im almost positive that its just a boost leak somewhere in the setup...

 

Make yourself a boost leak tester.

 

What kind of bov do you have?

Have seen isues with bows too slack(If you have a 50mm tial forget this), and vacum not properly setup.

It may be an error source

 

Yes its the 50mm bov... v band...

 

make sure that you put the fire ring on the wastegate or you will not be able to build any boost.

 

like stated above its in there...

 

so still can't figure out why my car won't boost... took the wastegate apart and there is a big red spring in there......

 

That is a .8bar spring

 

does your guage read vaccuum when at idle? If not, then the guage is wrong. How big is the turbo? When tuning a t67 once, we didn't think the turbo was spooling until we hit like 5000 rpms and then that **** kicked in.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ramma &raquo;</TD></TR><TR><TD CLASS="quote">does your guage read vaccuum when at idle? If not, then the guage is wrong. How big is the turbo? When tuning a t67 once, we didn't think the turbo was spooling until we hit like 5000 rpms and then that **** kicked in.</TD></TR></TABLE>

CT FTL