Small Block & Big Block Chevy Specific Mouse & Rat Motor Discussion & Conversions

No Start/No Spark Condition

Thread Tools
 
Search this Thread
 
Old Aug 28, 2025 | 07:10 PM
  #1  
Magman01's Avatar
Thread Starter
Teching In
Photogenic
Photoriffic
 
Joined: Aug 2025
Posts: 22
Likes: 2
Default No Start/No Spark Condition

Hello fellas. I'm hoping to get some assistance to get my (newly acquired) 1997 LT1 Camaro 4L60E up and running. I recently picked it up for cheap from a guy who also couldn't get it started, and it has been sitting in garages for over 3-years. I'm dealing with a "no-spark" condition. The starter cranks, fuel pressure is 43 psi, but I have no spark. I just replaced the ignition switch but that did not help. My factory Service Manual arrives tomorrow but I was hoping to get pointed in the right direction to get this fixed. Right now, I have no power at the PCM Blue connector pin 3 or Black connector pin 30. I also checked the PCM fuse in the under-hood fuse panel and have no power there either. Could this be as simple as a fusible link? If so, how the heck do you figure out which one? I'm a newbie to electronics, but I have most tools and references to get this fixed, I just need some technical guidance... Thanks in advance!
EDIT: I only checked fuel pressure with the fuel pump primer connection under hood; I did not record it while cranking.
1997 LT1, 4L60E, 3.73 Rear, 3600 Vigilante, Hooker Long tubes...No start!
1997 LT1, 4L60E, 3.73 Rear, 3600 Vigilante, Hooker Long tubes...No start!

Last edited by Magman01; Aug 29, 2025 at 08:20 AM.
Reply
Old Aug 28, 2025 | 08:11 PM
  #2  
Magman01's Avatar
Thread Starter
Teching In
Photogenic
Photoriffic
 
Joined: Aug 2025
Posts: 22
Likes: 2
Default

I just checked my PCM BATT fuse, fuse 3 in the driver's side fuse panel. It's supposed to be HOT at all times, and it has no power.
Reply
Old Aug 28, 2025 | 08:33 PM
  #3  
01CamaroSSTx's Avatar
11 Second Club
10 Year Member
Liked
Loved
Community Favorite
iTrader: (3)
 
Joined: Feb 2015
Posts: 6,012
Likes: 2,291
From: Conroe, Texas
Default

Have you checked to see if these two parts are in good condition?

Reply
Old Aug 28, 2025 | 08:46 PM
  #4  
Magman01's Avatar
Thread Starter
Teching In
Photogenic
Photoriffic
 
Joined: Aug 2025
Posts: 22
Likes: 2
Default

Originally Posted by 01CamaroSSTx
Have you checked to see if these two parts are in good condition?

https://www.youtube.com/watch?v=8nsN0I7f98w
My problem is before that. It’s within the vehicle wiring in the ignition circuit. Battery to fuse panels/ignition switch…somewhere in there is a break.
Reply
Old Aug 29, 2025 | 08:22 AM
  #5  
Magman01's Avatar
Thread Starter
Teching In
Photogenic
Photoriffic
 
Joined: Aug 2025
Posts: 22
Likes: 2
Default

Battery voltage reads 12.42 Vdc. PCM BATT fuse reads 3.4Vdc. Large orange wire at IGN switch reads 7.4Vdc. I'm not sure where to go next...
Reply
Old Sep 6, 2025 | 09:40 PM
  #6  
Magman01's Avatar
Thread Starter
Teching In
Photogenic
Photoriffic
 
Joined: Aug 2025
Posts: 22
Likes: 2
Default

Woo Hoo! I got it started! Turned out to be multiple electrical issues I had to discover one at a time. I found the battery negative ground was cut and half-*** soldered back together, then wrapped in a bundle of electrical tape. The PCM ground was connected to the starter solenoid, the ICM ground wire was not making a connection, and the ICM connector was shorting out (not making a connection). I ended up going through all grounds and re-splicing multiple connections today. This car hasn't started in over 3.5 years, so I'm calling success today! Thanks to SHBOX.com and my service manual - I was able to figure it all out!

Plan to find and fix a few more issues and then drop a 383 in it!
Reply




All times are GMT -5. The time now is 05:52 AM.

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