General GM Chat When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made. Chat about all things GM (and related cars). Off-topic stuff should be in the Lounge, and all Model specific mechanical problems should be posted in the proper forum.

Miss-firing

Thread Tools
 
Search this Thread
 
Old 10-07-2010, 01:15 PM
  #1  
Member
Posts like a V-Tak
Thread Starter
 
Syndr0me's Avatar
 
Join Date: Sep 2010
Posts: 39
Likes: 0
Received 0 Likes on 0 Posts
Syndr0me is on a distinguished road
Default Miss-firing

Hey guys,

I got the new HB on and running good a couple of weeks ago but now a now a new problem arises, I'm thinking blown head gasket. It sputter badly trying to keep it'* idle and has lost of unburnt fuel (smell it through the exhaust!). No fire? Maybe. But I'm thinking loss of compression. This happened around 4 grand while flooring it :/

As to note, I was left stranded on the side of the road for a good 40 mins at 12 at night on a dark road with nothing but my cell phone as a light and a pair of pliers in my trunk. Trying to get her to work. Checking for lose plugs or cables. Out of no where, she worked again.. for another 1.5km and then it started again. I finally pulled over on the bridge, sexy police women called a tow truck for me, when it arrived I gave it one last try and it worked fine ... until 600m down the road, luckily I was able to slowly drive it to the Canadian Tire right next to me (That'* where I work)


Any thoughts?

-Bad ground?
-Bad coils?

or a nice blown head gasket? It'* the 4K hard push that concerns me the most...

Thanks.
Old 10-07-2010, 01:24 PM
  #2  
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Likes: 0
Received 28 Likes on 24 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

I have yet to see a blown head gasket. I suggest pulling all the plugs and inspect them. if one isn't firing it will be black. Could be a bad coil. Also have you done a compression test?
Old 10-07-2010, 02:11 PM
  #3  
Senior Member
True Car Nut
 
Jonpro03's Avatar
 
Join Date: Jul 2010
Location: Danville, Illinois
Posts: 2,469
Likes: 0
Received 0 Likes on 0 Posts
Jonpro03 is on a distinguished road
Default

I also think it'* an ignition problem. ^^^^
Old 10-07-2010, 02:26 PM
  #4  
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Likes: 0
Received 8 Likes on 8 Posts
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

Going to ask you to elaborate a bit more.

some good info to provide.
What year and model car that you drive:
Have you scanned, what codes are present?
Does it feel like the catalytic is plugged?
Could you have bad fuel?
Are all cylinders firing?
Is the fuel pressure good?
Old 10-07-2010, 08:33 PM
  #5  
Member
Posts like a V-Tak
Thread Starter
 
Syndr0me's Avatar
 
Join Date: Sep 2010
Posts: 39
Likes: 0
Received 0 Likes on 0 Posts
Syndr0me is on a distinguished road
Default

What year and model car that you drive? 1992 bonneville ssei
Have you scanned, what codes are present? Nope, but the car always had CEL present with non working ABS and TCS.
Does it feel like the catalytic is plugged? Straight headers.
Could you have bad fuel? 91 octane petro canada
Are all cylinders firing? No
Is the fuel pressure good? Have not checked yet.
Old 10-09-2010, 08:51 PM
  #6  
Member
Posts like a V-Tak
Thread Starter
 
Syndr0me's Avatar
 
Join Date: Sep 2010
Posts: 39
Likes: 0
Received 0 Likes on 0 Posts
Syndr0me is on a distinguished road
Default

Ok, so I broke my arm. No car working for two weeks.

Peace all.
Old 10-09-2010, 08:57 PM
  #7  
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Likes: 0
Received 28 Likes on 24 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

Well, that'* crummy timing no mater how you look at it.
Old 10-09-2010, 08:59 PM
  #8  
Member
Posts like a V-Tak
Thread Starter
 
Syndr0me's Avatar
 
Join Date: Sep 2010
Posts: 39
Likes: 0
Received 0 Likes on 0 Posts
Syndr0me is on a distinguished road
Default

Leaping from a second story window to reach another while drunk, all for a pillow. Lesson learnt ;(
Old 10-09-2010, 09:03 PM
  #9  
Member
Posts like a V-Tak
Thread Starter
 
Syndr0me's Avatar
 
Join Date: Sep 2010
Posts: 39
Likes: 0
Received 0 Likes on 0 Posts
Syndr0me is on a distinguished road
Default

http://www.youtube.com/watch?v=mXufXhOhZbs

Towards the end if the video she started idling fine again. WTF?
Old 10-09-2010, 09:10 PM
  #10  
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Likes: 0
Received 28 Likes on 24 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

Bad idle can be caused by things like a dirty throttle body, dirty idle air control, or vacuum leaks. I would start with checking for any vacuum leaks, including the EGR tube. Also clean up the throttle body real good. Carbon deposits can cause all kinds of problems.


Quick Reply: Miss-firing



All times are GMT -4. The time now is 09:09 PM.