LS4 Performance Grand Prix GXP | Monte Carlo SS | Impala SS | LaCrosse Super

Won't start

Thread Tools
 
Search this Thread
 
Old Mar 11, 2014 | 08:15 AM
  #141  
Ill_Born_ss's Avatar
TECH Enthusiast
 
Joined: Nov 2008
Posts: 622
Likes: 1
Default

Spy, can you try using good booster cables from the neg on batt to the block/trans
Reply
Old Mar 11, 2014 | 10:01 AM
  #142  
spy2520's Avatar
12 Second Club
20 Year Member
iTrader: (3)
 
Joined: Feb 2005
Posts: 3,513
Likes: 1
From: Waldorf, MD
Default

Originally Posted by Ill_Born_ss
Spy, can you try using good booster cables from the neg on batt to the block/trans
I'll try that.
Reply
Old Mar 11, 2014 | 11:06 AM
  #143  
Ill_Born_ss's Avatar
TECH Enthusiast
 
Joined: Nov 2008
Posts: 622
Likes: 1
Default

Here is the start circuit. Test with your meter and a single blub test lamp (if you don`t have a 12v test lamp simply wire up a lamp and use it)
- in fig 2 you will have to hold the key in the start to complete/confirm that part of the circuit, check as much as you can.
- notice the current sensor as it is on the + not the - be sure it is secure and the tail is pointing to the pos terminal, also make sure the wires to it are good



Last edited by Ill_Born_ss; Mar 11, 2014 at 11:19 AM.
Reply
Old Mar 14, 2014 | 12:03 PM
  #144  
spy2520's Avatar
12 Second Club
20 Year Member
iTrader: (3)
 
Joined: Feb 2005
Posts: 3,513
Likes: 1
From: Waldorf, MD
Default

Purple wire to the starter is good. Does the current sensor actually control anything?
Reply
Old Mar 14, 2014 | 08:25 PM
  #145  
08 pimpala ss's Avatar
TECH Enthusiast
 
Joined: Dec 2012
Posts: 696
Likes: 0
From: WEST PALM BEACH FL
Default

I think there is a youtube video on how to make c4 Explosives you could just man i tried something someone told me to do from the forum and BOOOOOOOMMMMM

Just Saying
Reply
Old Mar 14, 2014 | 11:21 PM
  #146  
91parkave's Avatar
Moderator
15 Year Member
iTrader: (4)
 
Joined: Feb 2008
Posts: 2,079
Likes: 9
From: Arizona
Default

I don't know man at this point after all this maybe its just a bad ecm TCM
Reply
Old Mar 15, 2014 | 01:21 PM
  #147  
Ill_Born_ss's Avatar
TECH Enthusiast
 
Joined: Nov 2008
Posts: 622
Likes: 1
Default

Originally Posted by spy2520
Purple wire to the starter is good. Does the current sensor actually control anything?
Not a good answer, what about the other wires, wires from the switch to power up computers? Yellow ones having power at the ppl only says the start circuit partially works. When you turn the key other things happen to tell the computers to come to life.
The current sensor does play a big role, that little device carries a big stick. From under charging to over charging to shutting things down by 10% to completely shutting things down or even from ever starting up. It CONTROLS... electric power management. I believe I posted a link earlier.
Reply
Old Mar 16, 2014 | 01:30 AM
  #148  
heavyft's Avatar
On The Tree
 
Joined: Sep 2007
Posts: 164
Likes: 0
From: Dayton, OH
Default

Would the low tire pressure prevent anything?
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 Apr 7, 2014 | 10:29 PM
  #149  
spy2520's Avatar
12 Second Club
20 Year Member
iTrader: (3)
 
Joined: Feb 2005
Posts: 3,513
Likes: 1
From: Waldorf, MD
Default

ugh....It was a corroded connector on the engine....Ill_Born_ss, 91parkave, I really appreciate the help you gave. Now that the car is running, I'm ready to drive it into a ****** lake.
Reply
Old Apr 8, 2014 | 08:38 AM
  #150  
LeadfootDuramax's Avatar
Launching!
iTrader: (6)
 
Joined: Apr 2006
Posts: 262
Likes: 2
From: Houston, Texas
Default

Originally Posted by spy2520
ugh....It was a corroded connector on the engine....Ill_Born_ss, 91parkave, I really appreciate the help you gave. Now that the car is running, I'm ready to drive it into a ****** lake.
Which connector? Can you tell if something specific happened to cause the corrosion?
Reply
Old Apr 8, 2014 | 09:00 AM
  #151  
spy2520's Avatar
12 Second Club
20 Year Member
iTrader: (3)
 
Joined: Feb 2005
Posts: 3,513
Likes: 1
From: Waldorf, MD
Default

Unfortunately I dunno, took it to the dealer. They said it had been corroded for a while. Probably on the verge of not working for a long time.
Reply




All times are GMT -5. The time now is 09:33 AM.

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