I HAVE A 5.0 91 COUPE THE CAR RUNS FINE BUT ITS THROWING ALOT OF SMOKE WHEN I DRIVE IT LIKE U CAN SMELL THE FUMES IN YOUR CLOTHS AFTER GETTING OF THE CAR. (RUNNING RICH) MY FRIEND TOLD ME THAT IS SOMETHING ABOUT THE AIR AND FUEL MIXTURE, BUT I DON'T KNOW CAN SOME 1 HELP?