My 2001 4Runner.SR5,4WD, automatic, limits engine power to normally accelerate from a stop while in 4WD. The vehicle believes it should engage the VSC stability/traction control system which has resulted in many near miss rear end collisions because my 4Runner is not moving at a normal speed. It displays the Traction/Stability control icon and cuts engine power to almost nothing. After 2 or 3 seconds, which seems like an eternity when other vehicles are barreling toward you, the dash icon goes out and power returns to normal. This condition has been going on since new in 2001! When I complain to the Dealer Service their only fix was to replace the ashtray! What that has to do with acceleration I can't fathom. Other than during the upstate NY winter where I occasionally use 4WD this problem is a non-issue. It doesn't occur in 2WD mode except occasionally when turning form a stop and the tires are truly slipping in snow. In 4WD it happens, accelerating normally, from a stop going straight, or turning either direction 99% of the time.

Update from Apr 29, 2010: I wonder if Toyota is going to end up recalling my 2001 4 Runner? It seems that the 2003 Sequoia has this same lack of acceleration problem and it just got recalled!