Ok so I really need to get a sticker and pass emmisions. My car is a 96 mustang GT.I got long tube headers and a stock h pipe that has been welded to fit the longtubes and factory cats. For some reason I keep getting a rear o2 code so I used some mil eliminator kit. All my emmisions equip is working but my ckeck engine light comes on still. So I figure that I can clear the codes before I go in and add some ethonol to help reduce emmisions cause I'm not sure my cats are working right. Any other suggestions?