NHTSA Complaint #11176068 — 2004 BUICK LESABRE

THE VEHICLE RANDOMLY ACCELERATES AS HIGH AS 50-60MPH WITHOUT TOUCHING THE GAS PEDAL. THE CAR HAS TO BE THROWN IN NEUTRAL OR STOPPED SOME PLACE SAFE, AT WHICH POINT IT REVS UP PAST 3000 RPM UNTIL THE GAS PEDAL IS PRESSED TO THROTTLE IT BACK DOWN. THE VEHICLE HAS DONE THIS IN REVERSE WHILE BACKING OUT OF A DRIVEWAY AS WELL, WHICH IS EXTREMELY DANGEROUS. IT DOES NOT SEEM TO DO THIS UPON STARTING OR WHILE IT IS WARMING UP. IT CAN BE ON ANY STREET OR HIGHWAY AND AT ANY SPEED WHEN IT STARTS REVVING HIGH. THE PROBLEM IS INTERMITTENT, BUT CLUSTERS SOMETIMES SEVERAL DAYS IN A ROW AS CONSTANT AND THEN GOING A MONTH WITHOUT DOING IT AT ALL. IT DOES SEEM TO BE MORE LIKELY TO ACCELERATE AFTER HITTING A DIP (LIKE NEAR WHERE A DRAIN IS IN A PARKING LOT) BUT THAT MAY BE JUST COINCIDENTAL. THE CAR HAS BEEN TAKEN TO TWO DIFFERENT MECHANICS ON THREE SEPARATE OCCASIONS WITH A TUNE UP DONE AND THE THROTTLE BODY CLEANED ALONG WITH SOME OTHER TROUBLE-SHOOTING WITH THE THROTTLE AT A COST (THUS FAR) OF SEVERAL HUNDRED DOLLARS. THE VEHICLE IS DOING THIS SO FREQUENTLY IN THE LAST FEW DAYS THAT IS HAS BECOME UNSAFE TO DRIVE.