Hey guys if anyone has had this problem I got a 05 duramax and it has a miss at idle and if your passing someone it also has a miss.I hooked up my modis to it and it is telling me it threw 2 egr codes and an injector #2 output circuit code if you have any advice it would be appreciated thanx

 

If you have an aftermarket exhaust or deleted your kitty, it may have thrown the EGR codes (usually there are MAF codes with it though).

#2 injector: use an icepick to tighten the connector as seen here-
Diesel Place

 

ok thanx for the help