87 cutlass ceira (won't start if hot)

87 cutlass ceira 2.5 "iron duke". 55k miles. Throttle body injection, daily driver.

After a long drive it won't start for 10 to 15 min, it's a new trick it just learned. This thing has been incredibly reliable. It happened to me at a gas station, I wasn't able to do a spark test, I cleared the codes last week. It proudly showed its new trick at school today as my wife dropped off the kids. It didn't send any codes. After it fires runs great,full power all "93 hp " .

Thanks in advance for any tips on where to start? And if this is on the wrong topic, where should it go? Thanks so much.