Im still having that sputtering problem (mostly low end in gears). I changed the spark wires and my mechanic checked the spark and the distributor is fine. I had oil in my spark plug cylinders but got that out and changed the gaskets and oil hasnt been in it since. Change my fuel filter and had a three step Fuel injection cleaning system run through my car for the fuel injectors thinking that it was a fuel problem. The only prob. I have at the moment is an erratic idle from my IACV going bad but I doubt that is the problem. I havent been able to check if my computer is shooting codes because the guy i bout my Si from changed the wiring to OBD1 with an OBD1 computer from OBD2. Can anyone help, does anyone know wat the prob. is?

 

could be your O2 sensor/s?