WHILE DRIVING A DARK COLORED SMOKE CAME FROM EXHAUST, THERE WAS A NOISE IN ENGINE, RESULTING IN A FIRE. DEALER CONTACTED. COULD NOT FIX PROBLEM.*AK WHEN VEHICLE IS AT IDLE, IT OPERATES ROUGH, THEN VERY DARK SMOKE COMES OUT OF THE EXHAUST, AFTER 2 MINUTES THE PRIMARY RELAY RATTLES AND THEN THE A/C RELAY, THE ACCELERATOR RACES. THE WIRES IN THE HARNESS WIRE JACKET DISCHARGE A WHITE SMOKE AND THEN THE ENGINE IDLES DOWN WITH A SMOOTH SOUND. WHEN DRIVING ON THE HIGHWAY, AFTER ABOUT 2 MINUTES, THE VEHICLE WILL STALL, MECHANIC STATES POSSIBLE ELECTRICAL PROBLEM. *SLC