Conversions & Swaps LSX Engines in Non-LSX Vehicles
Sponsored by:
Sponsored by:

Dbw no throttle input

Thread Tools
 
Search this Thread
 
Old Jul 20, 2018 | 08:06 PM
  #1  
Mrngwoodstewie's Avatar
Thread Starter
Staging Lane
 
Joined: Dec 2017
Posts: 95
Likes: 0
Default Dbw no throttle input

hey guys; Im gonna keep searching but I got her running, but no throttle input. How should I go about troubleshooting it? I have a meter



Connector to pedal


Connector to throttle bodie. Thanks for any help!
Reply
Old Jul 20, 2018 | 09:06 PM
  #2  
Mrngwoodstewie's Avatar
Thread Starter
Staging Lane
 
Joined: Dec 2017
Posts: 95
Likes: 0
Default

The throttle bodie is getting power and... wait! I just thought of something. Could it be because im waiting on my dakota digital box and have no tach signal yet?
Reply
Old Jul 20, 2018 | 10:13 PM
  #3  
brandon6.0's Avatar
TECH Addict
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (32)
 
Joined: Dec 2009
Posts: 2,331
Likes: 29
From: Glennville, GA.
Default

whos harness? using a tach module or straight to the pedal assembly?

If this is a standalone harness im betting the pedal wiring needs switched around. 2 pins on the connector need changed weather u are using a truck pedal or corvette pedal. I had the same issue on a swap once. No throttle movement. swapped wires work perfectly!

If it is a stock harness, thin maybe it has the wrong gas pedal or tach module.
Reply
Old Jul 20, 2018 | 10:41 PM
  #4  
Mrngwoodstewie's Avatar
Thread Starter
Staging Lane
 
Joined: Dec 2017
Posts: 95
Likes: 0
Default

Its a tweaked performance ls -S2000 swap harness. The throttle bodie is holding idle and wont budge during operation; I tried to give it a little budge. So the ECU is controlling but not seeing my input. How or where would I find a pinout to see if wires are correct.

straight to the pedal
ls3 / PSI E38 PCM / tweaked harness / I beleive corvette pedal got it from psi to


Last edited by Mrngwoodstewie; Jul 20, 2018 at 10:46 PM.
Reply
Old Jul 21, 2018 | 12:58 AM
  #5  
brandon6.0's Avatar
TECH Addict
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (32)
 
Joined: Dec 2009
Posts: 2,331
Likes: 29
From: Glennville, GA.
Default

Here is a truck pedal pinout:

A- purple
B- light blue
C- tan
D- white/black
E- dark blue
F- brown

Compare this to yours to see if its wired as a truck setup.

Here is a vette pedal pinout:

A- brown
B- dark blue
C- white/black
D- tan
E- light blue
F- purple

But on most ls swap harness to run either a truck pedal vs. vette pedal u just swap pins D & F around.

Last edited by brandon6.0; Jul 21, 2018 at 01:22 AM.
Reply
Old Jul 21, 2018 | 01:11 AM
  #6  
Mrngwoodstewie's Avatar
Thread Starter
Staging Lane
 
Joined: Dec 2017
Posts: 95
Likes: 0
Default

I took a peek at the wires and I think they were ALL blue! :smackmyhead: prolly why they got mixed up! Lol.
I sent an email about everything. Ill check the wires again tomorrow. Go from there. Thanks!
If it is the case (bad pinout) I might have to check continuity from pcm to the Pedal lead :sigh: only way to distinguish which is which.
Reply
Old Jul 21, 2018 | 01:20 AM
  #7  
brandon6.0's Avatar
TECH Addict
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (32)
 
Joined: Dec 2009
Posts: 2,331
Likes: 29
From: Glennville, GA.
Default

Yea tht sucks.

All u do is swap pin D and F around from the truck orientation.

So if they are all blue just swap those 2 wires and give it a try.
Reply
Old Jul 21, 2018 | 01:22 AM
  #8  
Mrngwoodstewie's Avatar
Thread Starter
Staging Lane
 
Joined: Dec 2017
Posts: 95
Likes: 0
Default

So those letters are at the end of the plug/connector?
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
Old Jul 21, 2018 | 01:24 AM
  #9  
brandon6.0's Avatar
TECH Addict
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (32)
 
Joined: Dec 2009
Posts: 2,331
Likes: 29
From: Glennville, GA.
Default

Yes were the wires go into it. May have to remove the clip to see it. Really easy to do!
Reply
Old Jul 21, 2018 | 01:25 AM
  #10  
Mrngwoodstewie's Avatar
Thread Starter
Staging Lane
 
Joined: Dec 2017
Posts: 95
Likes: 0
Default

Im gonna meed a class on these pins to lol. I have the tool and I was practicing on another harness but just cant get it figured put ... cleanly lol
Reply
Old Jul 21, 2018 | 01:25 AM
  #11  
Mrngwoodstewie's Avatar
Thread Starter
Staging Lane
 
Joined: Dec 2017
Posts: 95
Likes: 0
Default

Roger that, ill check it tom. Thanks!
Reply
Old Jul 21, 2018 | 11:29 AM
  #12  
Mrngwoodstewie's Avatar
Thread Starter
Staging Lane
 
Joined: Dec 2017
Posts: 95
Likes: 0
Default

No letters to pins

Reply
Old Jul 21, 2018 | 11:54 AM
  #13  
Mrngwoodstewie's Avatar
Thread Starter
Staging Lane
 
Joined: Dec 2017
Posts: 95
Likes: 0
Default

Going by my last picture if someone knows which side F is I can swapem.
Reply
Old Jul 21, 2018 | 12:28 PM
  #14  
Mrngwoodstewie's Avatar
Thread Starter
Staging Lane
 
Joined: Dec 2017
Posts: 95
Likes: 0
Default

Nvm found it.
here it is for anyone else. Will report.

Reply
Old Jul 21, 2018 | 12:31 PM
  #15  
Mrngwoodstewie's Avatar
Thread Starter
Staging Lane
 
Joined: Dec 2017
Posts: 95
Likes: 0
Default

Ha! First thing I did was meter D for tbss and got five :smackhead:
Reply
Old Jul 21, 2018 | 12:49 PM
  #16  
Mrngwoodstewie's Avatar
Thread Starter
Staging Lane
 
Joined: Dec 2017
Posts: 95
Likes: 0
Default

Well that worked! but only for like 2 seconds
Reply
Old Jul 21, 2018 | 12:55 PM
  #17  
Mrngwoodstewie's Avatar
Thread Starter
Staging Lane
 
Joined: Dec 2017
Posts: 95
Likes: 0
Default

The pinouts at the PCM and Throttle bpdie are the same correct. Its either pedal pinout/or tune right?
Reply
Old Jul 21, 2018 | 01:46 PM
  #18  
brandon6.0's Avatar
TECH Addict
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (32)
 
Joined: Dec 2009
Posts: 2,331
Likes: 29
From: Glennville, GA.
Default

Just swap it around at the pedal pigtail. Leave the ecu harness side alone.

So u swapped those 2 pins around and it didnt work???
Reply
Old Jul 21, 2018 | 02:07 PM
  #19  
Mrngwoodstewie's Avatar
Thread Starter
Staging Lane
 
Joined: Dec 2017
Posts: 95
Likes: 0
Default

It gave two chig a lugs and then went back to the same thing, no input. After metering it I thought for sure that would do it. 😖

Last edited by Mrngwoodstewie; Jul 21, 2018 at 02:15 PM.
Reply
Old Jul 21, 2018 | 02:42 PM
  #20  
Mrngwoodstewie's Avatar
Thread Starter
Staging Lane
 
Joined: Dec 2017
Posts: 95
Likes: 0
Default

So fun fact. I reset the ecu an got it to rev again with throttle but goes back to no input.

im gonna do it once more to confirm.
Reply



All times are GMT -5. The time now is 05:50 PM.

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