My car runs rough over 2500 RPMs after it gets warmed up

What is your question?

I bought a 2000 Mazda Millenia about 6 months back, knowing it had the problem. What happens is once I start it I have about 10 minutes of it working perfectly fine. After 10 minutes I can no longer get the car over 2500 RPMs. When I try to get it over 2500 it jerks back and forth. But, I do not think it is temperature related, because if I turn the car off (including in Neutral, if I am on the highway) for about 10 seconds then turn it back on, it resets and it drives just fine again for 10 minutes as if I just started it. Any ideas?