LS1TECH - Camaro and Firebird Forum Discussion
LS1-LS2-LS3-LS6-LS7 PERFORMANCE
PCM Diagnostics & Tuning
no spark....help please

PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

no spark....help please

Reply Subscribe

Search this Thread

Old

Aug 15, 2011 | 12:44 AM

#1

Thread Starter

On The Tree

iTrader: (8)

Joined: Jul 2007

Posts: 116

Likes: 0

Default

no spark....help please

so i did a motor swap and i dont have any spark. the car cranks over but no spark at all. all grounds are connected. i also have power at the coil packs. my cam and crank sensors are connected. i'm thinking it has to be the grounds to the back of the heads but they look fine. could it be anything else im forgetting?

Thanks

Last edited by Ryan Armstrong; Aug 15, 2011 at 09:54 AM.

Old

Aug 15, 2011 | 04:55 AM

#2

10 Second Club

iTrader: (3)

Joined: Aug 2005

Posts: 889

Likes: 6

Default

Quote:

Originally Posted by Ryan Armstrong

so i did a motor swap and i dont have any spark. the car cranks over but no spark at all. all grounds are connected. i also have power at the coil packs. my cam and crank sensors are connected. i'm thinking it has to be the grounds to the back of the heads but they look fine. could it be anything else im forgetting?

Thanks

One reason for no spark when cranking is a damaged crank position sensor.
The coil packs have one black wire, which is ground. They also have a +12V wire, I think it is pink. Check they have 12V always.

I had a swapped Malibu with that same problem. It was a damaged crank sensor wire, because it goes very near where the engine mounts are located, I think it was crushed when installing the motor.

Fixed the wires and it started right away

Old

Aug 15, 2011 | 06:57 AM

#3

TECH Senior Member

iTrader: (3)

Joined: Jun 2004

Posts: 5,639

Likes: 71

From: GA, USA

Default

No power to the system when the key is in the start position??

Old

Aug 15, 2011 | 09:53 AM

#4

Thread Starter

On The Tree

iTrader: (8)

Joined: Jul 2007

Posts: 116

Likes: 0

Default

ok ill check that. no with the key on i have power at the coils, yet i have no spark

Old

Aug 15, 2011 | 06:50 PM

#5

TECH Senior Member

iTrader: (3)

Joined: Jun 2004

Posts: 5,639

Likes: 71

From: GA, USA

Lightbulb

And..

Quote:

Originally Posted by Ryan Armstrong

ok ill check that. no with the key on i have power at the coils, yet i have no spark

is there power there in the START position?????
Do you have a tach signal???

Old

Aug 15, 2011 | 07:24 PM

#6

Thread Starter

On The Tree

iTrader: (8)

Joined: Jul 2007

Posts: 116

Likes: 0

Default

ya with the key in the start position i have 12v at the coils. not sure about the tach signal??

Old

Aug 15, 2011 | 10:21 PM

#7

TECH Addict

iTrader: (2)

Joined: Aug 2003

Posts: 2,977

Likes: 3

Default

Quote:

Originally Posted by Ryan Armstrong

ya with the key in the start position i have 12v at the coils. not sure about the tach signal??

Does your tach needle move during cranking? Should move off the seat while the starter is spinning.

Trending Topics

Old

Aug 16, 2011 | 07:36 PM

#8

Thread Starter

On The Tree

iTrader: (8)

Joined: Jul 2007

Posts: 116

Likes: 0

Default

so i figured it out. it was a messed up wire to the crank sensor. it fired right up after i fixed that.

thanks for the help!!

LS1 Tech Stories

The Best V8 Stories One Small Block at Time

6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Brett Foote

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

Pouria Savadkouei

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Verdad Gallardo

7 Most Reliable High-Performance Engines GM Has Ever Built

Verdad Gallardo

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Verdad Gallardo

6 Common C5 Corvette Failures and What's Involved In Repairing Them

Pouria Savadkouei

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Verdad Gallardo

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Pouria Savadkouei

Top 10 Most Powerful Chevy Trucks Ever Made!

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Verdad Gallardo

Reply Subscribe

2000, 53, 99, bigstuff3, black, cam, carlo, chevy, coil, firebird, malibu, mont, power, sensor, spark, white, wont

First
Prev
1 / 1
Next
Last

All times are GMT -5. The time now is 01:29 PM.