number two cylinder wont fire
05-17-2010, 05:08 AM
#1
Thread Starter
Join Date: May 2010
Location: Arizona
Posts: 4
number two cylinder wont fire
My 2003 gt over heated and now my check engine light is on. The number two cylinder isn't fireing. I changed the spark plug and the coil pack and that has not fixed the problem. Any ideas?
05-17-2010, 02:01 PM
#3
5th Gear Member
Join Date: Mar 2008
Location: Ohio
Posts: 2,994
I assume you know the cylinder wasnt firing because you already pulled the codes correct>? Anything about the injectors mentioned? Could do a compression test also.
05-17-2010, 07:59 PM
#4
Thread Starter
Join Date: May 2010
Location: Arizona
Posts: 4
compression test showed number two and three cylinder have very low compression. no water in the oil or oil in the water but it seems the engine may have blew anyway unless anyone has any other ideas for me to try.
05-17-2010, 08:29 PM
#5
4th Gear Member
Join Date: Jul 2008
Location: NC
Posts: 1,956
Ah ****, sounds like you melted the piston/rings and lost compression
. Repeat the compression test and report specific results. GL with this.
05-18-2010, 10:42 AM
#7
TECH SAVANT
Join Date: Dec 2006
Location: Saint Augustine, FL
Posts: 10,938
There's a web of head gasket between the 1-2, 2-3, and 3-4 cylinders that is somewhat narrow and can crack without cross-contaminating the coolant and oil. Just a bit of warping from the overheating and it can blow out.
05-18-2010, 07:18 PM
#8
4th Gear Member
Join Date: Jul 2008
Location: NC
Posts: 1,956
Do you have an illustration of some sort of this webbing cliff? I'm having a hard time visualizing.
05-18-2010, 07:30 PM
#9
TECH SAVANT
Join Date: Dec 2006
Location: Saint Augustine, FL
Posts: 10,938
I have at times seen the broken "flap" of gasket behave as a check valve and allow one cylinder to develop enough compression to fire while the one next to bleeds down and will not fire...
Last edited by cliffyk; 05-18-2010 at 07:35 PM.