i know how to trouble shoot my bad mileage. my tps broke years ago and i never replaced it. i have no idea if the vacuum advance on my car is hooked up correctly. i know how coolant temp sensors work and why they would run rich or why a 02 could post a closed loop situation. my flapper box "mafs" is probably on its way out, if working at all. i could care less about the 5M and i dont daily the car. rich is good for WOT, i put 20 bucks in and i drive for the day. i wasn't asking a question, it was rhetorical.