Originally Posted by QuadCam

maybe you somehow melted all the blades off the turbine side of the turbo. I've seen it on RX-7s (but those roataries are like blowtorches!) If that were the case, the turbo would spin. Take the downpipe off and have a look at the turbine.

Originally Posted by chimmike

until you make a pressure tester and check according to the pics above, nobody is going to be able to help you.

I guarantee you have a leak. Until you have tested with a pressure tester, you cannot absolutely rule this out.

Also, I've had leaks large enough(yes, on the Z) where ZERO boost was made and it wasn't obvious that there was a leak (compressor outlet popped off a few times and did this)

So please. For your own good, make a pressure tester with a PVC cap like that and cap it over the compressor inlet with a coupler and use even a compressor, or even a bike pump, and put some air in there, 20psi or so, maybe 30, to see how it is.

Originally Posted by MIAPLAYA

Could be the plenum itself. I had a buddies whos car had a leak at the plenum and didn't exhibit ANY tpyical vacuum leak stuff. Also check the hot side piping. Maybe the feed side has developed a leak. Could be the BOV or wastegate too.

Originally Posted by g356gear

Hey MIA....BLOV was tightened down to max....no effect. Wastegate was removed and a block off plate installed.....still no boost built up with no wastegate in the system at all.

Originally Posted by MIAPLAYA

Then theres either a massive leak or the turbo is not spinning. Did you try moving the boost gauge signal to the compressor outlet port. That will tell you how much boost is being made at the turbo before any leaks could occur.

Originally Posted by g356gear

As stated earlier MIA....the system has been pressure tested with no loss of pressure. The impeller does spin when you touch it with your finger.

Originally Posted by MIAPLAYA

Like I said. If the impeller spins freely by hand, you should move the boost gauge signal to the compressor outlet port to see if its builds any pressure at the compressor housing to see if the turbo is spinning and building pressuer under load. Or remove the air filter section and run the car on the dyno to see if its actually moving... If its not then call Steve or Ed at Turbonetics and they will send you a new turbo...

Originally Posted by g356gear

At this point I am leaning toward a bad turbo. With no exhaust leaks leading to the turbo....and no pressure leaks after the turbo...logic would dictate that the impeller is no spinning fast enough to create a level of boost.

Originally Posted by chimmike

if it wasn't spinning fast enough you'd have horrible bogging while driving. Also I don't think it would just go bad without the seals going bad/melting and causing oil to be dumped in both sides and smoking like a chimney............I've never heard of a turbo going bad like that without smoking like crazy.

Originally Posted by g356gear

Well it's not bogging.....it just goes real rich past 1500 rpm's. The options for what could be wrong are getting pretty limited. There is zero smoke....car runs clean.

Originally Posted by LODOSS

Does the TN turbo make a high pitch sound sssssssssssssss or is it a more deeper mellow fuuuu sound? maybe i have a boost leak.. its either that or idon't know what big turbos sound like... i would assume they all sound the same... like a jet.

Originally Posted by LODOSS

I can't hear the turbo on my TN kit..

how noticeable is it suppose to be? I have been in my turbo cars. including my latest addition audi a4 which even in that . the little k03 turbo i can hear it spinning.

Originally Posted by chimmike

it's obvious it'll go rich because it's expecting boost and there is none, heh.

Originally Posted by chimmike

when you did the pressure test, did you open the throttle plate any?