PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Throttle Cutout

Thread Tools
 
Search this Thread
 
Old Aug 5, 2015 | 01:33 PM
  #1  
Unachievable's Avatar
Thread Starter
Teching In
iTrader: (2)
 
Joined: Apr 2011
Posts: 13
Likes: 0
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, 37 views)
File Type: hpl
test drive 1.hpl (91.8 KB, 45 views)
File Type: hpt
Ruby Base Tune 7.24.15.hpt (457.0 KB, 58 views)

Last edited by Unachievable; Aug 6, 2015 at 01:50 PM.
Reply
Old Aug 6, 2015 | 08:41 AM
  #2  
LSX Power Tuning's Avatar
FormerVendor
iTrader: (4)
 
Joined: Mar 2013
Posts: 2,367
Likes: 26
From: Brenham TX
Default

Without seeing the tune everyone will just be guessing. Was the tune done for no VSS?
Reply
Old Aug 6, 2015 | 01:48 PM
  #3  
Unachievable's Avatar
Thread Starter
Teching In
iTrader: (2)
 
Joined: Apr 2011
Posts: 13
Likes: 0
Default

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, 43 views)
Reply
Old Aug 10, 2015 | 04:02 PM
  #4  
Unachievable's Avatar
Thread Starter
Teching In
iTrader: (2)
 
Joined: Apr 2011
Posts: 13
Likes: 0
Default

thread bump
Reply
Old Aug 13, 2015 | 02:45 PM
  #5  
Brando5641's Avatar
12 Second Club
iTrader: (3)
 
Joined: Apr 2010
Posts: 247
Likes: 1
From: NW Arkansas
Default

Does it do it all the time or just under hard acceleration? I cant view the log for some reason.
Reply
Old Aug 13, 2015 | 05:36 PM
  #6  
Unachievable's Avatar
Thread Starter
Teching In
iTrader: (2)
 
Joined: Apr 2011
Posts: 13
Likes: 0
Default

its all the time
Reply
Old Aug 13, 2015 | 10:12 PM
  #7  
Brando5641's Avatar
12 Second Club
iTrader: (3)
 
Joined: Apr 2010
Posts: 247
Likes: 1
From: NW Arkansas
Default

Loose ground?
Reply
Old Aug 15, 2015 | 08:15 AM
  #8  
Unachievable's Avatar
Thread Starter
Teching In
iTrader: (2)
 
Joined: Apr 2011
Posts: 13
Likes: 0
Default

I'll look into that thanks for the suggestion
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo




All times are GMT -5. The time now is 06:35 AM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE