DevonsZ

iTrader: (20)

My friend just built his truck over the last few month and is running gen7 I belive. Well he first got 50lbs injectors and they work fine and the truck runs good but they max out at about 10-12lbs of boost @ 4000rpm and he is wanting to run 18-20psi. So he got so 160lbs and now the thing jumps all over the place *afr* when the duty cycle is under 2% at either a steady speed *50'ish* or under decell.

Any ideas.