2003 TOYOTA AVALON Engine And Engine Coolingengine Problems

OUR 2003 TOYOTA AVALON HAS EXPERIENCED SEVERAL OCCURRENCES OF SUDDEN ACCELERATION. MY WIFE TOOK THE CAR TO OUR TOYOTA DEALER AND BOTH TIMES THEY SAID THAT IT WAS DUE TO THE FLOORMAT STICKING UNDER THE GAS PEDAL. THE MAT WAS REMOVED AND IT STILL HAS THE PROBLEM. WHILE I WAS DRIVING IT DOWN THE HIGHWAY, I LET OFF THE GAS TO SLOW DOWN AND IT STARTED TO SPEED UP. I PUT THE CAR INTO NEUTRAL AND THE ENGINE STARTED TO REV UP AND DOWN FROM 1000 RPM TO 2500 RPM. THIS CONTINUED FOR A COUPLE OF MINUTES UNTIL I WAS FORCED TO PULL OVER TO THE SIDE OF THE ROAD AND TURN THE ENGINE OFF AND RESTART IT. (THIS IS ALWAYS THE FIX...TURN OFF THE ENGINE AND RESTART IT. IT SEEMS TO RESET THE COMPUTER). THIS PROBLEM STARTED OVER A YEAR AGO AND CONTINUES TO OCCUR ALMOST MONTHLY. THIS VEHICLE...

TL*THE CONTACT OWNS A 2003 TOYOTA AVALON. WHILE DRIVING APPROXIMATELY 65 MPH ON NORMAL ROAD CONDITIONS, THE VEHICLE RESPONDED SLOWLY WHEN THE BRAKE PEDAL WAS DEPRESSED. THE CHECK ENGINE WARNING INDICATOR ILLUMINATED ON THE INSTRUMENT PANEL INTERMITTENTLY. IN ADDITION, THERE WAS EXCESSIVE OIL CONSUMPTION. THE VEHICLE WAS TAKEN TO THE AUTHORIZED DEALER AND THEY STATED THAT THE FAILURE WAS RELATED TO OIL SLUDGE BUILD UP. THE TECHNICIAN RECOMMENDED THAT THE ENGINE BE REPAIRED OR REPLACED. THE FAILURE OCCURRED ON NINE SEPARATE OCCASIONS. THE VEHICLE HAS NOT BEEN REPAIRED. THE FAILURE MILEAGE WAS 88,000 AND CURRENT MILEAGE WAS 100,858.