went on a dyno /tune earlier and 1st pull was around 330whp and 2nd run was 350whp. after that car got messed up. it lost its power its only making 190whp now. afr is around 11.5 and no knock retard. we tried to looks for boost leaks and looks like there was nothing, the only way that we can do it there was feel by hand while car is in boost. also inspected the bov to see if its leaking. none!! and then we watch the exhaust manifold if theres a fire or smoke coming out. theres nothing. after that we did a compression test and its good also. so after 3 hours trying to figure it out we just called it a night. drove the car home and the car is so slow now but i can hit target boost with no problems.
i will do a boost leak tomorrow again to see. if thats not the problem, what else it could be?
help

i will do a boost leak tomorrow again to see. if thats not the problem, what else it could be?
help