LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Need some wireing help before i part this project out.

Thread Tools
 
Search this Thread
 
Old Jul 16, 2014 | 09:08 PM
  #1  
94LTZ's Avatar
Thread Starter
TECH Resident
iTrader: (5)
 
Joined: Jun 2009
Posts: 750
Likes: 1
Default Need some wireing help before i part this project out.

Short version-
I have a 1994 Z28 that started life as a auto. It now sits as a t56 swap with a 24x conversion that I repined a 94 t56 harness for using a brand new 411 PCM. My tuner loaded in a base tune using his 02 35th SS auto. Pretty sure he did not shut the VATS off either.

My issues consist of-
1- Car will not crank what so ever, fuel pump will not prime either.
2- I have power at the OBll port but can not communicate with the PCM

This was supposed to be a 1 year project that has turned into a 4 year project since life got in the way ( had a kid, got engaged, bought a house and changed jobs) but I need this car to show me some sings of wanting to run or I will be breaking it down and parting everything out and putting the car in storage and forget about it.

Thanks for any help.
Reply
Old Jul 16, 2014 | 09:37 PM
  #2  
flame's Avatar
TECH Fanatic
20 Year Member
iTrader: (13)
 
Joined: Oct 2004
Posts: 1,169
Likes: 3
From: Waterloo, Ontario
Default

Sounds like the PCM is missing power somewhere. Make sure the pink wires have 12v with key on and orange are 12v all the time. The check engine light should come on and bulb check with key on if the PCM is powered up. Vats signal is the same so should be okay.
Reply
Old Jul 16, 2014 | 09:47 PM
  #3  
94LTZ's Avatar
Thread Starter
TECH Resident
iTrader: (5)
 
Joined: Jun 2009
Posts: 750
Likes: 1
Default

I'll double check but the check engine light does come on with the key.
Reply




All times are GMT -5. The time now is 11:22 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