not stage 1, its system 1 for standard evo. plug and play ,for boost 1.3 , 7500k rpm limit, unlimit 180km, modify correction point , advance timming ,. etc
Boost goes up nicely to 0.5 bar at 3000rpm but then starts to drop to 0.3 bar starting 3000rpm until 4500rpm. After that it fluctuates about between 0.4 and 0.3 bar until 6000rpm. Any idea why? Boost leak?