i boough the motor at a junkyard...i was lucky enough to find out the car was a gsr and the motor was blown so the person that owned it before me swapped in a LS. now here the problem.. the set up is 95 ls with gsr tranny OBD1 gsr harness into a 93lx 4dr.. car runs and starts fine on an open header and B.S. INTAKE.. when the car is about to pass 3k it pops and wants to die out.. if anyone has had this problem please let me know... maybe i have a plug that shouldnt be plugged in or maybe the fuell pump and fuel filter is bad...cause they havent been changed and the cars got 130 k on it