LS1TECH - Camaro and Firebird Forum Discussion

Generation III External Engine LS1 | LS6 | Bolt-Ons | Intakes | Exhaust | Ignition | Accessories
Sponsored by:
Sponsored by:

Car wont start after headers and mounts =[

Thread Tools
 
Search this Thread
 
Old Jun 15, 2007 | 02:35 PM
Share
  #1  
scottHMT's Avatar
scottHMT
Thread Starter
Launching!
iTrader: (5)
 
Joined: Apr 2007
Posts: 237
Likes: 0
Default Car wont start after headers and mounts =[
I installed pacesetter LT with their y pipe, and prothane mounts. My car cranks but wont fire. I have brand new plugs with brand new MSD wires. The plug on the top of the alternator is plugged in, the hole ontop of the intake manifold is plugged. I cant figure out why it wont start. Coil pack plugs are connected, IAT is connected, MAF is connected. This is kinda frustrating. The rear o2's are not plugged in, but the front o2's are plugged in.
Reply
0
Old Jun 15, 2007 | 02:38 PM
Share
  #2  
Blu99T/A's Avatar
Blu99T/A
TECH Enthusiast
iTrader: (5)
 
Joined: Feb 2006
Posts: 642
Likes: 2
From: Florida
Default
Start by checking ALL your fuses. Did you disconnect the battery for the install?
Reply
0
Old Jun 15, 2007 | 02:40 PM
Share
  #3  
mglooper's Avatar
mglooper
On The Tree
iTrader: (5)
 
Joined: Jun 2007
Posts: 153
Likes: 0
From: midland texas
Default
does it start then die or just not even try to at all?
Reply
0
Old Jun 15, 2007 | 02:54 PM
Share
  #4  
WOTFMAN's Avatar
WOTFMAN
Banned
iTrader: (3)
 
Joined: May 2007
Posts: 149
Likes: 0
From: Richardson, TX
Default
Originally Posted by scottHMT
I installed pacesetter LT with their y pipe, and prothane mounts. My car cranks but wont fire. I have brand new plugs with brand new MSD wires. The plug on the top of the alternator is plugged in, the hole ontop of the intake manifold is plugged. I cant figure out why it wont start. Coil pack plugs are connected, IAT is connected, MAF is connected. This is kinda frustrating. The rear o2's are not plugged in, but the front o2's are plugged in.
Check the ground behind the alternator that connects to the frame rail. I believe without that it wont start.
Reply
0
Old Jun 15, 2007 | 03:06 PM
Share
  #5  
5.3LJimmy's Avatar
5.3LJimmy
10 Second Club
20 Year Member
iTrader: (10)
 
Joined: Jun 2004
Posts: 2,279
Likes: 1
From: Napoleonville, LA
Default
Also check the crank position sensor(located behind the starter on the side of the engine). It will not run at all if you accidentally knocked it loose.
Reply
0
Old Jun 15, 2007 | 03:38 PM
Share
  #6  
BLK02TA's Avatar
BLK02TA
TECH Fanatic
iTrader: (11)
 
Joined: Feb 2006
Posts: 1,123
Likes: 0
From: Fort Knox, KY
Default
Originally Posted by 5.3LJimmy
Also check the crank position sensor(located behind the starter on the side of the engine). It will not run at all if you accidentally knocked it loose.
Thats my guess.
Reply
0
Old Jun 15, 2007 | 03:42 PM
Share
  #7  
68birdls1's Avatar
68birdls1
11 Second Club
20 Year Member
iTrader: (46)
 
Joined: Feb 2004
Posts: 1,667
Likes: 0
From: jacksonville, fl
Default
Yea there is either a sensor not plugged in or a ground that is loose
Reply
0

Trending Topics

Old Jun 15, 2007 | 07:47 PM
Share
  #8  
scottHMT's Avatar
scottHMT
Thread Starter
Launching!
iTrader: (5)
 
Joined: Apr 2007
Posts: 237
Likes: 0
Default
i disconnected the battery for the install, the driver side ground is connected. It cranks but doesnt fire.
Reply
0
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 Jun 16, 2007 | 10:40 AM
Share
  #9  
scottHMT's Avatar
scottHMT
Thread Starter
Launching!
iTrader: (5)
 
Joined: Apr 2007
Posts: 237
Likes: 0
Default
Originally Posted by 5.3LJimmy
Also check the crank position sensor(located behind the starter on the side of the engine). It will not run at all if you accidentally knocked it loose.

exactly the problem, everything is great now. Im terrorizing the neighborhood open header. Thanks everyone.
Reply
0
Old Jun 16, 2007 | 06:36 PM
Share
  #10  
mnypitZ's Avatar
mnypitZ
TECH Apprentice
iTrader: (19)
 
Joined: May 2007
Posts: 371
Likes: 0
From: Deland, FL
Default
At least that is all you did. I accidently sucked a rag into the intake and bent valves and the car is still not running 3 weeks later.
Reply
0
Old Jun 16, 2007 | 08:08 PM
Share
  #11  
bmax's Avatar
bmax
Launching!
iTrader: (1)
 
Joined: Dec 2001
Posts: 204
Likes: 0
From: South of Heaven
Default
Originally Posted by mnypitZ
At least that is all you did. I accidently sucked a rag into the intake and bent valves and the car is still not running 3 weeks later.


I bet you had a funny look on your face right after you saw that rag disappear.
Reply
0
Tags
Back to Subforum
Generation III External Engine
View Next Unread
MTI clear lid




Advanced Search

All times are GMT -5. The time now is 04:28 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