Twinturbo's not boosting

[lord_jagganath]

HEY! I am a total Subie N00bie, and I just bought a 99 BH5 JDM Legacy GT Automatic( I am from NZ ).
The car threw a Check Engine Light and the "VDC off" Light was on too, upon hard acceleration ( when it hit 5500RPM)...
I cruised to a halt, and shut the engine off. after that, i restarted it. The lights disappeared after that...
I took the car to a diagnostician, and he said the turbo's weren't spooling and the computer gave off three error codes, two code 66 ( apparently deals with the twin turbo system) and a code 32 ( O2 sensor) ... he cleared the codes, and it didn't return. But one thing for sure, it isn't boosting at all... the turbo's are spinning but no boost... what is my problem?

BTW... should i install a boost gauge to see what is the issue?

[Huffer]

Boost gauge and oil pressure are your two best gauges on a stock turbo car. Hit up Reuben in Auckland he'll be a lot of help for you.

The tech should have told you why the turbos aren't boosting, and how to fix it...

[jey]

If the turbos are spooling and there is no boost, you could have a boost leak, but you'd be able to hear it.

Could be the bypass valve failed.

[lord_jagganath]

Thanks for the replies guys, He did mention that the solenoids could be wonky, ( my mistake for not mentioning it earlier).


but i took it to my usual mechanic, and he did this ----> http://xs942.xs.to/xs942/09351/dsc00157edit224.jpg.xs.jpg (http://xs.to/xs.php?h=xs942&d=09351&f=dsc00157edit224.jpg) and voila! there is boost!
so it that thing faulty?

- I will get in touch with Rueben, for some gauges... Thanks for the tip :D

[jey]

Yes, that is the bypass valve. Disconnecting it completely identifies it as the problem, but you will need to address it. Without a bypass valve you are now in danger of compressor surge. Stay off the boost until you get it fixed.

[lord_jagganath]

^ Thank you very much!! Allow me to be a total arse, can i replace it with a Blow off valve? or is a stock part better to use?

[hallowpoint]

^^+1 get it fixed asap.

[Huffer]

^ Thank you very much!! Allow me to be a total arse, can i replace it with a Blow off valve? or is a stock part better to use?

You can, but a proper recirculating valve (like a newer stock part) is better. BOVs are mainly for show unless the car is properly tuned to release that much pressure to atmosphere.

[jey]

Get the stock part unless you are planning on do some modification to the boost. A BOV that vents to the atmosphere will throw off the air-flow readings that your ECU uses to calculate air/fuel mixture and it won't run as well.

[lord_jagganath]

aye, fair enough, i will try to get an almost new part if possible. I do not plan to do any further boosting anytime soon... but i will still get the gauges. Oil pressure, oil temp and boost gauges

[lord_jagganath]

:smt022 no luck... replaced the aforementioned part and still no boost... i am such a fool who is a little poorer... but i suppose i could live without the boost...
now i have a used ( in good working condition) Bypass valve... 100 USD including shipping...

[jey]

Ok so what does that hose that was pulled lead to?

[lord_jagganath]

it leads to an electronic valve... http://img198.imageshack.us/img198/4880/dsc00162pmf.th.jpg (http://img198.imageshack.us/i/dsc00162pmf.jpg/) I got my mechanic to pull off the intercooler and now i think i may have found the main problem. one of the turbos aren't spinning. :smt022 ..
http://img402.imageshack.us/img402/5986/dsc00164o.th.jpg (http://img402.imageshack.us/i/dsc00164o.jpg/) the left turbo isn't spinning..