my 94 z with no mods.recently started giving trouble. when cold,starts fine & runs like a champ.once it gets hot from driving around it wont start after i park.try to start it and it will chug and misfire an wont respond to accelerator. let it sit for 30 min. will fire up and run good,no problems!opti, was replaced by previous owner at dealer alittle before i got it

 

Seldom a PCM problem. Have you scanned it for codes? Have you checked the fuel pressure? Have you had the ICM tested?