I HAVE A 2002 SC430, WAS IN A ACCIDENT,,NOW THE ENGINE DOES NOT START ,, IT CRANKS BUT NO START..CANT SMELL ANY GAS,,WHAT SHOULD I CHECK,, AND THE ROOF STARTS FOR ABOUT 2 OR 3 SEC,THEN IT STOPS,,I HAVE TO TURN THE KEY OFF AFTER EVEY STOP TO COMPLETE THE OPEN OR CLOSE OPERATION