PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

98 z28 with 99up harness

Thread Tools
 
Search this Thread
 
Old Nov 14, 2014 | 10:11 AM
  #1  
gmcyukon's Avatar
Thread Starter
On The Tree
iTrader: (9)
 
Joined: Sep 2011
Posts: 183
Likes: 0
From: Shreveport la
Default 98 z28 with 99up harness

Ok here the deal guys. I have a 98z I did the pin out swa, I'm using a truck 411 pcm and engine side works fine. But Tran doesn't work so great. I only have 1-2,-3. When I come to a complete stop I just have 2-3. Any suggestions?. I was thinking about just putting a 99 harness in the car from a friend. But I was told that the harness is different. What would work and what wouldnt work.
Reply
Old Nov 14, 2014 | 12:38 PM
  #2  
gto65lvr's Avatar
On The Tree
iTrader: (8)
 
Joined: Nov 2007
Posts: 104
Likes: 0
From: the couve, washington
Default

if it worked before You may have to go back to make sure you have all the wires in the right place. find out which ones control the trans an make sure you swapped them right. I had an issue with my fuel gauge when I did mine and had the fuel segment swap done correctly in my 98 Formula. after checking the 2 wires that work that part of the system I found that I actually put the wire in the wrong place even though I had it labeled correctly.
Reply
Old Nov 14, 2014 | 12:51 PM
  #3  
gmcyukon's Avatar
Thread Starter
On The Tree
iTrader: (9)
 
Joined: Sep 2011
Posts: 183
Likes: 0
From: Shreveport la
Default

It has never worked before. I have all the wires in the right spot. I question an orange wire from the trans. It's labeled grey on the diagrams I look at. It's the low reference circuit wire.
Reply




All times are GMT -5. The time now is 08:25 PM.

story-0
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-1
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-2
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-3
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-4
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-5
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-6
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-7
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-8
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-9
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