boosting really low

[ThisIsSparTTa]

Good work man. Congrats on the downpipes, should make a big difference over stock.

One thought, any chance there's a rag somewhere in your system? Its a common issue that people forget about them. You could take off your pipes from up top going into the turbos to be sure. Could also check at your intercoolers, etc.

[bentotdagr3at]

This will be my next step and checking that the throttle bodies are opening and closing at the same time. One might be a little open. We will see.

Thanks for the input. I'll get this figured out sooner than later hopefully

[bentotdagr3at]

I just want to report back as this might be helpful to others with similar problem.

Car has been parked over winter and I have been tinkering and trying to find the damn leak. Over the winter I decided to get some new Godspeed SMIC. Installed them today and checked all the vacuum lines I could fine.

Short story, I bypassed the carbon canister that was sitting behind the driver side intercooler and removed any tees I have for vacuum lines.

As soon as I started the car, vacuum sat at 18 in Hg! Carbon canister was probably leaking. Old IC pressure test showed no leak.

I set the timing to 15 degrees and now I'm at 19 in Hg.

Now I'm itching to drive it. Should be a blast. Almost sold her but now she's a keeper.

Hope this helps somebody else in the future.

[DCaff300ZX]

Very interesting solution, I went through everything you did and could only conclude a turbo was seized...and was the case upon repairs.
BTW, the test you used to run her at higher RPM and pull a boost hose to test the turbo operation is the only known test of them on the car and their true operation/not, so good job with that.
Good Luck in the future, glad you are back to enjoying your Z!

[ThisIsSparTTa]

Congrats man. My carbon cannister had a crack in the top and was leaking as well. However, we found it doing a boost leak test. I eventually did a full delete all the way back to the fuel tank to clean things up a little more.