Hey whats up guys, new owner of a 2010 ss/tc here. ran into some issues the other day, took the car out and did a WOT 2nd to 3rd pull. soon as i hit 3rd car stopped building boost, like it went into safe mode. it proceeded like this for a little while until i cut it off and back on. After that it was fine and running normal. i wanted to test it one more time, so this was a 3rd to 4th and this time got a flashing check engine light. it stopped flashing when i let off, i scanned the codes and they were p2270, p0140, and p0304 cylinder 4 misfire.


I cleared the codes and did a quick spin around the block and let it idle for a bit and nothing came back. this has never happened to the car before and the car is unmodified aside from GMS1.


I did a search but still not exactly sure where to go from here, i understand p2270 and p0140 are 02 sensor codes but aren't these for the ones after the cat? Any help would be appreciated.

 

Check your sparkplugs the gap probably expanded or its got allot of carb on them. You dumped all your fuel in the cat cause of the missfire its gonna take a while before that code goes away.

 

Will do. When these rear 02s go bad, is it best to just tune those out?


Posted from Cobaltss.net App for Android