89 gta 350 tpi starts fine then after it has run and is up to operating temp (195) will not start (just cranks) until car cools for 20-30 minutes, fuel pump runs when key is turned on, Any Ideas?

 

Have you checked spark and fuel pressure when it won't start?

 

No I have not, But i did some more testing last night and it is more intermitent than I thought, it seems if I tap the maf sensor enough it will start but not always, I didn't have any problems until I cleaned the maf sensor with maf cleaner last year , should I try cleaning it again? also I did not have any problems until I installed headers, also
I checked the vacumn line to the fuel pressure reg, no gas in it.

 

I had a similar problem where I'd get spark but no start after the engine warmed up. I replaced the Ignition Module and never had a problem since. So thats what I'd try, good luck!