After failing 4 times, spent countless saturdays checking my car, and blew $100 on a tuneup i've narrowed it down to my car needing an EOM cat or it's the EGR not working properly.. Start with those.. Aftermarket cats must be inferior.. The EGR may not even work on the 15mph state dyno because it needs to be at 2-3k to function.. BLah!!!!NismoSER said:Kesi, if I knew bro, I'd tell you. I don't have to worry about this till October 2005...so I'm not gonna worry about it until say....September 30th?