Quote Originally Posted by VIP Style
im sorry but how can a car be running too rich? educate me bout this please.
hmmmmm. normally stoich is 14.7:1 which is what the car is looking for w/ o2 feedback in closed loop. n/a motors wot will be tuned between 12.5:1 and 13.5:1 depending on how high the compression is. boosted motors will be tuned between 11.0:1 and 12.5:1 depending on compression, boost, octane used. 11.0:1 is considerd pretty d#mn rich to begin with. if your car is running richer than that and blowing a lot of black smoke, or if you're burning a lot of oil, you can clog/burn out the o2.

probably more info than necessary, but hope that makes sense.