2008 SUZUKI GRAND VITARA Engine Problems

THERE IS A ENGINE KNOCK WHILE VEHICLE IS IN NEUTRAL OR PARK. TOOK IT TO THE DEALER SERVICE DEPARTMENT. THEY THINK IT MIGHT BE A LOWER MOTOR ISSUE. VEHICLE ONLY HAS 21000 MILES ON IT.

THE VEHICLE WAS PARKED IN A STORE PARKING LOT AND WHEN I STARTED THE CAR PUT IT IN REVERSE AND THEN IN DRIVE TO EXIT THE PARKING LOT. WHEN ON THE STREET THE CAR WENT ACROSS THE STREET I PUT MY FOOT ON THE GAS AND IT STALLED. WHEN I MY PUT MY FOOT ON THE GAS TO GO FORWARD IT DIDN'T RESPOND. I THEN PUT THE CAR IN PARK AND THE CAR JUMPED FORWARD THREE TIMES ON ITS OWN AND THEN STOPPED REPEATING THIS AGAIN, BUT NOT A THIRD TIME BECAUSE I SHUT THE CAR OFF. THEN I RESTARTED THE CAR. I WAS ABLE TO COAST WITH HAZARDS ON TO MY HOUSE UNDER 10 MPH. O SHUT IT OFF AND CALLED THE AUTO MECHANIC. THE THROTTLE SENSOR WENT. SO MY CAR NOW STAYS AT THE STATION AWAITING A NEW SENSOR WHILE I AM WITHOUT A MEANS TO GET TO...