Toyota Repair: 93 celica 5s-fe with a sputtering/hesitation?, air fuel mixture, egr valve

Question
Ted,
You seem to be the man to ask about these problems. The above stated car when cold runs fine when it warms up it sounds like an old volkswagen. With no check engine lights.
I've replaced- plugs, fuel filter, tps.

I unbolted the EGR while it was running funny all that happened was the idle went up. The problem still existed.
The thing that I am curious about is that it happens whe it warms up. A coolant sensor?

Answer
A coolant sensor problem would turn the check engine light on, by removing the egr valve a vacuum leak was created at the intake manifold which will make the computer richen the air/fuel mixture and speed the engine up. Look for an intake air leak before the intake chamber, between the air filter and the throttle body, check the large rubber connecting hoses for possible cracks, let me know if that's it or not.