LS3powered

iTrader: (2)

Oh, and the cyl that are missfiring are 3,5,7

budhayes3

iTrader: (19)

What does the O2 sensor activity look like, could be a bad bank 1 O2 sensor, or maybe injector ground on that side or you could have a plugged cat on that bank. Seems like all of bank1 (except for cyl 1) is misfiring...you could try swapping the O2 sensors side to side and seeing if the misfires follow...

AKlowriderZ71

iTrader: (22)

You need to check exhaust backpressure on both banks, before the cats. It sounds like a plugged cat.

Modern_Muscle

iTrader: (11)

nd the diagnostic said the timmking was off


Is that supposed to be Timing?

wouldnt that explain a lot?

white lightning SS

iTrader: (3)

I feel pretty confident you have a plugged bank one cat. Check backpressure or pull the Y-pipe off and inspect.