PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Throttle Cutout

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Old Aug 5, 2015 | 01:33 PM
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Default Throttle Cutout

I just completed a LS swap and I opted to tune with HPTuner. To get the car in the ballpark I also ordered a base tune through PCMofNC. Long story short we took it out to make a few pulls to test the tune and it seems that the throttle completely cuts out mid pull randomly. The setup utilizes a drive by cable system so I know that the throttle blade isn't actually closing however the data recorded suggest that the TPS is at zero percent when this occurs. I have already replaced the TPS and MAF sensor. Has anyone had this issue or can anyone make a suggestion. I have attached data of the problem area in and excel worksheet as well as in the HPTuner form. On the HPTuner data-log the issue occurs from 600 frames to roughly 800 frames.

Side notes
- I am not letting out of the throttle
- VSS is not hooked up
- O2 Sensors are disconnects
Attached Files
File Type: csv
Throttle Cutout.csv (59.8 KB, 39 views)
File Type: hpl
test drive 1.hpl (91.8 KB, 46 views)
File Type: hpt
Ruby Base Tune 7.24.15.hpt (457.0 KB, 59 views)

Last edited by Unachievable; Aug 6, 2015 at 01:50 PM.
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Old Aug 6, 2015 | 08:41 AM
  #2  
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Without seeing the tune everyone will just be guessing. Was the tune done for no VSS?
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Old Aug 6, 2015 | 01:48 PM
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No the tune doesn't incorporate a vehicle speed sensor delete it simply isn't hooked up at the moment. I have attached the tune file to this reply and update the post, thanks for you help.
Attached Files
File Type: hpt
Ruby Base Tune 7.24.15.hpt (457.0 KB, 44 views)
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Old Aug 10, 2015 | 04:02 PM
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thread bump
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Old Aug 13, 2015 | 02:45 PM
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Does it do it all the time or just under hard acceleration? I cant view the log for some reason.
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Old Aug 13, 2015 | 05:36 PM
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its all the time
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Old Aug 13, 2015 | 10:12 PM
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Loose ground?
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Old Aug 15, 2015 | 08:15 AM
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I'll look into that thanks for the suggestion
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