general problems of the 2013 Toyota Sienna

The 2gr-fe engine on my Sienna has experienced a front timing cover leak. It's slowly leaking oil out of my vehicle and I'm afraid it will get worst over time. My vehicle has less than 100k miles and if the leak persists, I down want my vehicle breaking down and leaving me stranded.

When vehicle is in motion and I take my foot off the accelerator to coast to yield to oncoming traffic, but then see my way clear to accelerate into traffic and put my foot on the gas to enter the traffic flow, my vehicle stalls and won't accelerate. Where normal acceleration and "pick up" would enable me to enter traffic safely, there have been numerous occasions when I have almost been hit by other vehicles. My vehicle has been in motion on city streets or entry ramps, slowing, then attempting to join traffic when I seemed to have plenty of room to accelerate, except my vehicle has stalled. . Engine didn't quit running, just couldn't "get gas" to go. Have taken it to my local dealer twice and was told they could find nothing wrong; it was a computer "matter" trying to adjust to my driving habits. This did not seem to be a transmission linkage, there was no jerking. Vehicle just wouldn't accelerate. Happened on numerous occasions.

I was stopped at a bank drive up window, with my foot on the brake and as I put the vehicle in park the engine surged up to about 6900 rpm. I have had this happen to me about 4 or 5 times that the engine has surged as I have stopped. I have taken the vehicle to Toyota repair and been told that the vehicle computer does not indicate that there is a problem. I have been able so far to maintain control the vehicle, but this has happened too many times for it not to be reported.

My wife and I were going out of our 60 foot driveway. We were going forward as I always back into the driveway. I applied the accelerator a little to get the car to the end of the driveway. I applied the brake and held it down so I could look for traffic. As I held down on the brake, the engine started to "race" as if someone was pushing the accelerator to the floor. The brakes held. I turned off the motor, calmed down and restarted the engine- no motor "rush. " thank the lord this happened in our driveway. Had this happened on the highway, we could have killed someone or gotten killed ourselves. My first thought was of all those recalls because of unintended acceleration. My second thought was, "when will this happen again?".