2000 Jeep Wrangler Racing engine when stopping

Check the Idle air control valve and look for any vacuum leaks. Fuel injected engines do not use a choke. They have a cold start valve which adds additional fuel to the engine when cranking. The engine, when cold, uses a set group of parameters programmed in the PCM which increases injector pulse width (adding fuel) until the engine goes into closed loop.

You would also want to check the throttle linkage to the throttle body and make sure it is not binding.