I need help...MY 94 hatch wont pass emissions and i dont know why. i have a gsr in my hatch, but i dont know what year the engine is, if its obd1 or obd2. the number on the head is not clear, i cant tell if it says 98, 96, or 95, the number seems damaged or something. are there any other clues as to finding out what kind of motor you have? I keep failing for high nox levels. i have a l2 sensor hooked up and working, an legal cat, and still, its too high...