STATE6
////ONE NATION\\\\
- Joined
- Oct 25, 2011
- Messages
- 16
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- Location
- Baltimore, MD USA
- Members Ride
- 2011 Camaro RS
Has anyone over on this side have experienced or is currently experiencing rough idle and misfires only during "cat warm up mode"? (The time when you first start the car and your car idle high for 20-30 seconds).
A few months ago while it was still winter in the states my 2011 SIDI V6 camaro started idling very rough during cat warm up mode and threw a few misfire codes. It would come and go and it only happens for 20-30 seconds during cat warm up mode only so I just lived with it. Now it's every time I start the car while the engine is cold. Not sure if is because the weather have warmed up but I don't get any misfire CEL anymore but my cat warm up mode is very very rough still. I checked everything from coils, plugs, vacuum lines, to even doing a compression test. Everything came back normal. I recently had my cat warm up mode turned off by my tuner but I figured this was only band aiding the problem so I decided to have it turned back on and look for the cause.
I been doing some research on this problem and it look as though at least one of every direct injected GM vehicles have had this same or similar problem but I never found anyone come up with an answer except for a few LNF(cobalt SS) guys who said that they noticed the teflon seals would get burned off or just come off completely or purge solenoid valve would go bad causing similar symptoms. Now I haven't checked my purge solenoid valve or my high pressure fuel injectors yet. I really don't think my injectors are faulty because one, it only happens while in cat warm up mode. I can start the engine cold or hot, if I bypass the cat warm up mode this problem does not exist. I would think if I have a leaky injector or teflon seal blown I would have different issues at different times. I could be wrong tho... now the purge solenoid valve..I just found out about this part failing alot a few days ago so this might have to be my next things to check on the list. I am hoping this part is not located under the car tucked in somewhere as I think it is.
Any help from this side would be greatly appreciated!
A few months ago while it was still winter in the states my 2011 SIDI V6 camaro started idling very rough during cat warm up mode and threw a few misfire codes. It would come and go and it only happens for 20-30 seconds during cat warm up mode only so I just lived with it. Now it's every time I start the car while the engine is cold. Not sure if is because the weather have warmed up but I don't get any misfire CEL anymore but my cat warm up mode is very very rough still. I checked everything from coils, plugs, vacuum lines, to even doing a compression test. Everything came back normal. I recently had my cat warm up mode turned off by my tuner but I figured this was only band aiding the problem so I decided to have it turned back on and look for the cause.
I been doing some research on this problem and it look as though at least one of every direct injected GM vehicles have had this same or similar problem but I never found anyone come up with an answer except for a few LNF(cobalt SS) guys who said that they noticed the teflon seals would get burned off or just come off completely or purge solenoid valve would go bad causing similar symptoms. Now I haven't checked my purge solenoid valve or my high pressure fuel injectors yet. I really don't think my injectors are faulty because one, it only happens while in cat warm up mode. I can start the engine cold or hot, if I bypass the cat warm up mode this problem does not exist. I would think if I have a leaky injector or teflon seal blown I would have different issues at different times. I could be wrong tho... now the purge solenoid valve..I just found out about this part failing alot a few days ago so this might have to be my next things to check on the list. I am hoping this part is not located under the car tucked in somewhere as I think it is.
Any help from this side would be greatly appreciated!