My evo 6 (173.xxx kms) drives normally when I drive calm. But when I give it WOT it boosts to 1.3 bar (peak) then starts jolting heavily and boost drops to 0.8 bar. I'm running a evo 8 turbo.
Things I have already changed:
BOV: evo 8 MR fitted
Wastegate actuator: Evo 8 fitted with appropiate...