PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

TPS Reset Not Working Please Help!

Thread Tools
 
Search this Thread
 
Old May 27, 2014 | 03:38 PM
  #1  
Ben Volk's Avatar
Thread Starter
Teching In
 
Joined: Jun 2013
Posts: 8
Likes: 0
Default TPS Reset Not Working Please Help!

So I've done the TPS reset procedure that's featured in this forum four times and every time my scanner still reads 2% throttle at the end. Has anyone else had trouble doing this? I'm just trying to smooth my idle out and I'm using the Torque OBD app.

Edit: Every time I shift into drive the car surges against the brakes so I'm assuming my scanner isn't the problem.

This is what I've been doing:

IAC Relearn Procedure
If you are having idle issues you may need to reset your Idle Air Control (IAC) and TPS, do this before you start drilling holes in your throttle body (TB) blade. I have used this procedure on some huge cammed cars and it worked.
1) Monitor your IAC, Idle Speed, throttle position voltage and your throttle position %.
2) With the key in the ON position, adjust your TB set screw until your throttle position is 2%.
3) Turn your key to the OFF position.
4) Unplug your Throttle Position Sensor (TPS) and IAC.
5) Turn your key to the ON position for a few seconds, and then OFF again.
6) Plug in the TPS and IAC and then turn your key to the ON position and restart logging. Your throttle position will now be reset to 0 degrees and about .45-.55 volts.
7) Start your engine, your IAC should be 40-60 for a cammed engine.
If you are not at your desired IAC position, redo the above procedures in smaller increments.
Reply
Old May 27, 2014 | 04:21 PM
  #2  
Ben Volk's Avatar
Thread Starter
Teching In
 
Joined: Jun 2013
Posts: 8
Likes: 0
Default

I have a 1999 LS1
Reply
Old May 27, 2014 | 05:45 PM
  #3  
2xLS1's Avatar
TECH Senior Member
20 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (25)
 
Joined: Nov 2001
Posts: 5,649
Likes: 9
From: Warr Acres, OK
Default

Your closed throttle TPS voltage is too high. Probably by opening the throttle blade with the closed position set screw it was never designed for. There is a point where it will not reset to zero.
Reply
Old May 27, 2014 | 07:59 PM
  #4  
01WS6/tamu's Avatar
TECH Senior Member
20 Year Member
iTrader: (37)
 
Joined: Oct 2004
Posts: 5,121
Likes: 75
From: somewhere in TX
Default

What kind of throttle body and mods
Reply
Old May 27, 2014 | 09:39 PM
  #5  
Ben Volk's Avatar
Thread Starter
Teching In
 
Joined: Jun 2013
Posts: 8
Likes: 0
Default

It's the stock throttle body and the only real mod is a mild cam. Would half a turn be too much for it to reset?
Reply




All times are GMT -5. The time now is 04:02 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