my car will start and when i cut it off it will have to sit for 15 to 20 mins before it will fire back up turns over no problem... i replace the tps and put a new distributor in it just so it does the same thing any ideals would be great i have msd digital 6 hooked up have 44 psi of fuel pressure just not sure where to look now unless its my computer.....

Still has the TPI I assume? When it won't start, does it have spark? Does the fuel pressure hold when you shut it off?

it has spark and fuel pressure holds ......i have put a new coil a new distibutor new plugs...im starting to think its the computer but when it does runs have no power

If it has spark and FP, all that's really left is to fire the injectors. Have you tried reseating the ECM connector? How about cleaning the grounds on the back of the passenger side head?