Pontiac When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made.

what controls firing sequence on a GM 3.8l v6

Old Mar 8, 2012 | 10:35 PM
  #1  
k9lz's Avatar
Thread Starter
Junior Member
 
Joined: Sep 2011
Posts: 1
Likes: 0
k9lz is on a distinguished road
Question what controls firing sequence on a GM 3.8l v6

I have a 2000 Firebird. Its a bare bones 3.8l 5 speed. Here is my problem:
The middle coil pack wont fire. I replaced both the control module and the coil with new parts. Still no go. What controls the sequence and how do I test to find out if that signal is not being generated??
Reply
Old Mar 9, 2012 | 12:00 AM
  #2  
crunkfrunk's Avatar
Senior Member
Posts like a Corvette
 
Joined: Jun 2008
Posts: 1,389
Likes: 0
From: Cleveland, OH
crunkfrunk is on a distinguished road
Default

https://www.gmforum.com/trouble-shooting-test-procedures-141/icm-test-299761/

That explains how to test the entire ICM, so I'm assuming you're firing fine on the other 4 cylinders?

My guess would be a bad crank or cam sensor but if one of the sensors is bad I would think you would have issues with the other cylinders not firing at the proper time.
Reply
Old Mar 9, 2012 | 07:40 AM
  #3  
BillBoost37's Avatar
DINOSAURUS BOOSTUS

Expert Gearhead
 
Joined: Mar 2005
Posts: 41,391
Likes: 30
From: Enfield, CT
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

The ICM runs the motor for the first 10 seconds. After that the PCM takes over control.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
bonnevillemac
Audio (and aftermarket electronics)
4
Jan 25, 2008 04:04 PM
naMyegooBehT
1992-1999
8
Sep 29, 2006 01:30 PM
Layla
1992-1999
43
Apr 15, 2005 09:51 PM
DJ SHO
Forced Induction
2
Sep 4, 2004 02:15 AM
1993 SLE
General GM Chat
19
Oct 26, 2003 08:08 PM


Thread Tools
Search this Thread

All times are GMT -4. The time now is 07:51 PM.