Hi guys
New to the forum and need some help as im out of things to check. I have a mk5 golf 1.9 bkc and I have just fitted a new turbo and it's overboosting when revving past 3k. I have tried the map maf and n75 box off another car, adjusting the actuator to 18inhg, fixed all boost leaks. I also blocked of the vac line to the actuator so it couldn't open the vnt and made no difference. Any help would be much appreciated as its really bugging me.