I WAS ACCELERATING ON THE FREEWAY WHEN THE CAR SHUDDERED AND I SAW SMOKE COMING OUT OF THE HOOD. I WAS ABLE TO PULL OVER QUICKLY, RELEASED THE HOOD AND STEPPED OUT OF THE CAR THRU THE PASSENGER SIDE DOOR. I OPENED THE HOOD AND SAW THE FUEL INJECTOR WAS ON FIRE SO I IMMEDIATELY SLAMMED SHUT THE HOOD AND CALLED FOR HELP. FORTUNATELY A MOTORCYCLE COP FROM THE SAN DIEGO POLICE WAS AT THE SCENE JUST MOMENTS AFTER IT HAPPENED. HE RADIOED FOR A FIRE TRUCK WHICH ARRIVED ABOUT 15 MINUTES LATER AS THIS HAPPENED DURING THE RUSH HOUR (5:45 PM). THE ENGINE WAS COMPLETELY ENGULFED IN FLAMES BY THEN. AAA HAS NOT DETERMINED YET IF THE CAR WILL BE TOTALLED BUT I'M PRETTY SURE IT WILL BASED ON THE EXTENT OF THE VISIBLE DAMAGE. I HAD THIS CAR SERVICED BY KEARNY MESA TOYOTA ABOUT TWO MONTHS PRIOR TO THIS INCIDENT FOR A CHECK ENGINE LIGHT. THEY REPLACED THE VACUUM SWITCH VALVE.