NHTSA Complaint #10689426 — 2004 TOYOTA SIENNA

THE OUTSIDE TEMPERATURE WAS BELOW 32 AND IT WAS CLOSE TO 25 OR SO. WHEN I WAS DRIVING THE CAR AT 40 MPH WITH ENGINE TEMP STILL SLIGHTLY ABOVE COLD(NOT AT OPTIMAL WHICH IS ALMOST HALF WAY) AND SLOWED DOWN BY USING GENTLE BRAKES(NOT HARD BRAKES). JUST BEFORE THE VEHICLE COMES TO A FULL STOP, THERE IS UNINTENDED ACCELERATION AND I COULD SEE EVEN THE RPM(SCALE) TO SPIKE TEMPORARILY. THIS HAS BEEN HAPPENING EVERY TIME WHEN OUTSIDE TEMP IS COLD AND VEHICLE IS DRIVEN WITH COLD OR SLIGHTLY ABOVE COLD ENGINE TEMPERATURE. THERE IS A RISK OF HITTING ANOTHER VEHICLE OR MEETING ACCIDENT IF MISJUDGE MY BRAKING BECAUSE OF THIS PROBLEM.. PLEASE NOTE : THIS PROBLEM DISAPPEARS WHEN ENGINE TEMPERATE IS AT OPTIMAL AND I HAVE DRIVING A HONDA ACCORD 2008 EXL FOR LAST 7 YEARS(WAS BOUGHT NEW ONE), I NEVER HAD EXPERIENCED THIS PROBLEM IN THAT CAR EVEN WHEN DRIVEN WITH COLD ENGINE. *TR