just fitted a evo chip on my LET I cant get it to boost more than 16psi overboost and 12psi normal, and its developed a misfire when boosting above 10 psi. (the chip is supposed to boost to 18-19 over boost and 14-16 normal)
I disconnected the pipes going to the actuator and plugged them, but still the same (only 16 at the most). iv been told the penny valve has possibly cracked, is this something I can change myself ? can anyone give me any other ideas ?