MY 1998 BUICK LESABRE BACKFIRED, THEN STARTED ON FIRE, AFTER THE TOP OF THE MOTOR{INTAKE AND FUEL INJECTORS ETC.} WERE BLOWN OFF DURING THE EXPLOSION. THE WHOLE TOP OF THE MOTOR WAS DESTROYED. NOTIFIED GM, AND THEY SAID THEY WOULD NOT HELP BECAUSE OF A STATUTE OF LIMITATIONS. THEY KNOW THERE IS A PROBLEM!!! *TR