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2003-2009 Nissan 350Z

Added turbo, dies on rev, need help

Old Sep 12, 2017 | 07:29 AM
  #21  
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Wait, do you have a MAP sensor? My car works off the MAF(this is mounted after turbo) then it switches to MAP under boost.
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Old Sep 12, 2017 | 09:45 AM
  #22  
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Yea same that's how I'm logging. I have the uprev OBDII port reader/tuner and I plug that into my $1,200 gaming laptop and run cyris. Which is how I can run the logging charts like I posted above with the YouTube links.

And I have tried to look into my manual, and Uprev PDF's and it's all basic info. It shows the map and MAF tuning but it doesn't explain what on the interface to click on.

Same with YouTube. The only ones that do are from like 2011 with a completely different versiOn of Cyris. And I hope someone does in pulling my hair out at this point lol
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Old Sep 12, 2017 | 11:24 AM
  #23  
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Not like anyone has $1000 laying around but might you be able to swap over to haltech or Uprev?

This sounds like a tuning issue but I wouldn't even know where to start trouble-shooting utec.
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Old Sep 12, 2017 | 12:29 PM
  #24  
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I have Uprev.

I just can't figure out how to pull the MAF/MAP tune table.
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Old Sep 12, 2017 | 12:50 PM
  #25  
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^oh! Someone should know how to do that...
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Old Sep 12, 2017 | 03:32 PM
  #26  
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Attached is my AFR/System logging while holding RPM's.

Excel format. You will probably need to expand the header tabs to see each unit recorded.
Attached Files
File Type: csv

Last edited by CK_32; Sep 12, 2017 at 03:39 PM.
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Old Sep 15, 2017 | 06:39 PM
  #27  
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Are you going back to try and get tuned tomorrow again? This is a discouraging thread for anyone looking to add some bonus power.
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Old Sep 16, 2017 | 07:15 AM
  #28  
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No, what I might do is take it to project import and have them run a smoke test. If it comes up negative for a vacuum leak, I'm going to raise some hell about my $1,000 tune that never happened, because of a vacuum leak that's not there.
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Old Sep 16, 2017 | 03:36 PM
  #29  
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Ok through process of elimination I chose to take the turbo out of the situation. Drive the car around the block and on the streets. To test and see if it dies under load.


IT DOES NOT. Smooth idle. No weird revs, no bad come down idle.

Im almost 100% sure the turbo is spooling sooner than they thought, which is causing it to lean out and die. Thus why it needs a tune but they assumed it was a vacuum leak.

My fix to elimate the turbo and turn it back to a very expensive NA lol (see attached photo)

Can someone else with a NA working car who has uprev or any tuner log their AFR's driving?
Attached Thumbnails Added turbo, dies on rev, need help-img_3976.jpg  

Last edited by CK_32; Sep 16, 2017 at 03:44 PM.
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