LS3 rough idle

[BICHN CAMARO]

Originally Posted by HeaterMan

I have noticed that since day one my LS3 has a rough idle. almost as if it has a lean miss. sometimes it's worse than other times. I know some guys say it's because of the big cam but i don't buy it. I know what a big cam sounds and feels like and this aint it. if it were an issue with cam duration it would have a slight rhythm which i dont have. anybody have any info on this problem? i cant believe a fuel injected car with this mild a cam doesnt idle smooth.

I feel the exact issue on mine. Sometimes worse than others. Almost like a miss when it is at its worse. I was going to ask the dealer to check it out when I come in for an oil change. I have owned an LT1 vette but this is different.