MY VEHICLE WAS A 2001 CHEVY IMPALA, ( CITY POLICE VEHICLE) 02/17/10 I WENT OUT IN THE MORNING TO START THE CAR PARKED IN THE DRIVEWAY. UPON TURNING THE IGNITION TO THE ON POSITION THERE WAS A SONIC BOOM. (SO MUCH THAT IT SHOOK OUR HOUSE)THE ENGINE COMPARTMENT BEGAN SMOKING MY HUSBAND ( A FIREMAN) RETURNED TO THE CAR AND SLIGHTLY LIFTED THE HOOD AND FOUND IT HAD FLASHED OVER AND WAS TOTALLY INVOLVED. 911 WAS CALLED AND FIRE DEPARTMENT RESPONDED EXTINGUISHING THE FLAMES. THIS IS CITY POLICE VEHICLE SO NOT SURE WHAT IF ANYTHING WILL BE DONE BUT I WANTED TO REPORT THE INCIDENT IN HOPES THAT IT WOULD HAVE AN IMPACT OF KEEPING OTHERS FROM BEING INJURED. THIS EXPLOSION WAS POWERFUL AND FAMES ERUPTED IMMEDIATELY. SEARCHING THE WEB A ODI RESUME WAS FOUND WHICH I BELIEVE TO BE THE CIRCUMSTANCE OF MY EXPERIENCE. INV: EA 02-030 PROMPTED BY :PE02-050 THIS WAS A COLD START , IN THE WINTER MONTHS AND THE VEHICLE HAS A PLASTIC MANIFOLD. ALSO THE 8TH VIN DIGIT IS AN 8. OUR DEPARTMENT HAD SEVERAL OF THESE VEHICLES ON THE ROAD I WOULD LIKE TO KNOW IF THERE WAS A RECALL OR IF WE SHOULD HAVE FURTHER CONCERN ABOUT THE OTHER 2001 CHEVY IMPALAS ON THE ROAD THANK YOU *TR