I am having trouble starting my vehicle when it is hot

Lets start by running the codes.

https://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method

If nothing comes up two things come to mind with this problem, first is a vacuum leak which can be checked by following this guide.

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

The next thing is the engine coolant temperature sensor is slightly out of range which causes the computer to lean out the fuel mixture.

Here is a guide to help with that:

https://www.2carpros.com/articles/coolant-temperature-sensor-cts-replacement

Please let us know what happens so it will help others.

Cheers, Ken