stellaboy

hi all have had my 95 wrx import for a few months now and have been having trouble with losing all power usually before 3000rpm but can be all the way up to 5000rpm. the power is only brought back by turning the ignition key off and then back on. sometimes the check engine light has come on after but goes again. sometimes doesnt happen for a bit but normally at least a few times per journey. has anybody had this problem before or can help?