-
Grand Future Air Dried Fresh Beef Dog Food
Air Dried Dog Food | Fresh Beef

Carnivore Diet for Dogs

Go Back   Automotive Forums Car Chat > Pontiac > Montana/Montana SV6
Register FAQ Community
Reply Show Printable Version Show Printable Version | Subscription Subscribe to this Thread
 
Thread Tools
  #1  
Old 01-06-2005, 08:28 PM
Capri22SS Capri22SS is offline
AF Newbie
 
Join Date: Nov 2004
Posts: 19
Thanks: 0
Thanked 0 Times in 0 Posts
Mis-firing on cold start

Just a quick question: 1999 Montana....3.4L....I have a mis-fire in the engine, just 1 cylinder but after it warms up it runs fine. I thinking it may be an intermitent coil pack. When it mis-fire's the service engine soon light is blinking, but when it clears up the engine light is on steady. If anyone can comment, please let me know.
Reply With Quote
  #2  
Old 01-07-2005, 06:55 AM
Glen_T Glen_T is offline
AF Regular
 
Join Date: Dec 2004
Posts: 286
Thanks: 0
Thanked 2 Times in 1 Post
Re: Mis-firing on cold start

Can you have the code read at Autozone or a place like that? That would really help pinpoint if it is the coil pack, an injector, or something else.

The coil pack is a likely suspect, but too expensive to just swap and try it....Good luck, Glen
Reply With Quote
  #3  
Old 01-07-2005, 08:48 AM
Capri22SS Capri22SS is offline
AF Newbie
Thread starter
 
Join Date: Nov 2004
Posts: 19
Thanks: 0
Thanked 0 Times in 0 Posts
I really don't have access to an AutoZone here in the Chicago Area. Last night I did pull each spark plug wire from the coil pack and all seam to be working. I'm now suspecting an injector, spark plug or a wire. I just did the lower intake gaskets and I probebly should have changed the plugs when they were easy to get to. I'll check those first to see if I can identify which cylinder it is. Thanks for the reply.....
Reply With Quote
  #4  
Old 01-07-2005, 02:03 PM
Glen_T Glen_T is offline
AF Regular
 
Join Date: Dec 2004
Posts: 286
Thanks: 0
Thanked 2 Times in 1 Post
Re: Mis-firing on cold start

I think other places will read you codes for free.

Not always wise to pull plugs while running. Best to pull the wire, start the car, check for misfire, shut it off, repeat.....some of the electronic ignitions used to warn against pulling wires while running, but it may not matter anymore.

Still could be a thermally induced coil fault....glen
Reply With Quote
  #5  
Old 01-07-2005, 11:04 PM
Capri22SS Capri22SS is offline
AF Newbie
Thread starter
 
Join Date: Nov 2004
Posts: 19
Thanks: 0
Thanked 0 Times in 0 Posts
Thats exactly what I did. I removed each wire from the coil pack with the engine not running. Then refired and was able to witness a good spark from each coil. That was the good news. Tonight I proceeded to take a chance and check continuity on the spark plug wires. Since the problem was getting significantly worse every day, my thoughts were that if there was a broken wire, the arcking in the wire may have spread wider to a point it couldn't bridge the gap. Well low and behold, wire for cylinder #6 did not have continuity when checking with an ohm meter. All the others were fine. I replaced to #6 wire from a new set and problem solved. It's now beating on a 6....WEEOO.

I'm not sure if the computer codes would have told me there was a broken wire or not. I may have pointed me to cylinder #6.

When the weather warms up, I'll change the rest of the wires.

Thanks for all the feedback guys, and if I can help out any of you, I will....
Reply With Quote
 
Reply

POST REPLY TO THIS THREAD

Go Back   Automotive Forums Car Chat > Pontiac > Montana/Montana SV6


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 01:24 AM.

Community Participation Guidelines | How to use your User Control Panel

Powered by: vBulletin | Copyright Jelsoft Enterprises Ltd.
 
 
no new posts