My 96 corolla with the 4AFE engine has developed a problem that I can't figure out. Under full throttle, right before it gets ready to upshift at the highest rpms, it looses all power and starts bucking and missfiring. It won't stop until I lift my foot off the gas, then it smooths out and runs fine. The interesting thing is it only happens after the car is fully warmed up. It has new spark plugs, plug wires, distributor cap and rotor, air filter, and fuel filter. It runs perfectly otherwise. I'm stumped.