1999 Chevy Lumina heats up

1999 Chevy Lumina Minivan mileage: 101,000. I have read all the posted Q and A on Lumina's and some are close but not addressing my issue. I have done a major tune-up including the O2, map, TPS, airflow control, full injectors and regulator replacements as well as fuel pump pressure testing. Cooling temp sensor has been replaced and the cooling fan cycles with the temp of the engine when needed. Although it now really runs sweet my problem has not gone away. This van has never failed to start cold. If the van was just shut off hot and then restarted; it starts and drives without issue. However, drive the van around and get it warm, park it for 30 minutes the problem starts. It will start without failure but if you try to drive away it stalls and dies. To correct the issue you must feather the gas pedal for around 30 seconds until you can build the engine RPM up and hold it high until it smoothes out. Then drivability is fully restored. I have shot carb cleaner at the TBI while it was doing this and that helps the vehicle to recover so my guess is fuel related. The top end of the engine gets extremely hot after shutting it off and letting sit. I noticed while changing the last injector some fuel dripped on the butterfly in the TBI and it sizzles and evaporates. This leads me to wonder why the heat is rising to the top end to such a high degree when shut off, it gets hot enough the breather is difficult to handle. We have had the van over a year; put over 20,000 on it, many long trips and the problem has been there from the beginning. The problem hasn’t really gotten any worst, however it is not near the problem during our cold Iowa winter, spring is here though. My next thoughts are Exhaust system and maybe the EGR.