I just bought 2008 Toyota Sienna on February and experienced the hesitation when I tried to accelerate my vehicle after slowing down at the intersection at the speed between 5 to 10 mph. When I stepped on the gas at the speed I mentioned above, the engine seemed to roar up, but my car didn't move, and for a few second later it took off. It is intermittent. I had it serviced at the dealer I bought it from, but did not find any thing wrong. And I've been told by a few people including a service manager at the dealer that it is normal. They kept telling me that the new Toyota Siennas are computerized connecting the gas pad to the fuel injection. Because the signal has to move from the pad to the computer and to the fuel injection, that why a few second delay occured. I'm not a mechanic, but I know enough to understand how the computer works. Yes, there is a delay between touching the keyboard and printing data on the monitor. But as a users or the drivers, the delay should not be noticable. The service manager told me the specialist from Toyota come to dealer once a month and will have them checked my 08 Sienna. I also reported this issue to Toyota customer support. They documented the problem on my car and will set up to have my car checked at the dealer. It've been almost a month already, I have never heard any thing from them.
I just want to know if there are any 08 Toyota Sienna owners out there have experienced the same problem as I do.