My 88 RENIX runs slightly rich at cold and hot engine temp. Temp runs at 195-200 consistantly. The O2, CTS, and MAP are about 25,000 miles old, I have a new TPS adjusted correctetly, newer IAC, and a benched clean throttle body. I have a disconnected and plugged EGR, and I just noticed, while WOT during the night, I can see a gray haze on the cars headlights behind me, coming from my exhaust. But this isnt noticeable in the daytime. Ever since I got my new exhaust system, I had a sooty exhaust at the end of the pipe. Like I said, I replaced everything computer related, so Im stumped. Oh and my gas mileage SUCKS. (10mpg) Thanks for any help.