i recently bought a 240sx with a rb25det
its stock with a garret turbo
my problem with it now is when i rev and drive it, the engine lags to go past 3k rpm . the boost controller(hks timer turbo) is has no screen on. my gauge on the says er5.
the fuel rato is between 39 psi and 41psi
what can i do to order to resolved this issue.