Won't start after its hot

Hi,I'm having problems witht the car not wanting to start after it has been ran for awhile.I moved the fuel/air sensor that was located on the cold air intake and placed it into cylinder 5 as to what Pro M said to do.I will list my mods that I have done so far. I need some sort of idea of what direction to go.

Edelbrock Victor 5.0
AFR 185 heads
Lunati Cam 232 duration 550in/564exhaust
DSS Flat top Pistions
30lbs injectors
80mm Pro M mass air\
Crane Cams Hi6 w/ LX92
75mm Throttle body off of Fox body 93
Mac 1'3/4'' equal length shorties
Mac Power Chamber
G Force Transmission

I havn't changed to factory computer yet, I have the check engine light coming on also.I tried to turn the fuel pressure down to 35lbs but the car ran really crappy, I turned it back up and its running rich.I drove the car today and when I stepped on it at WOT it ran the rpms up then acted like it was cutting out and fell on its face. I changed out the plugs again and put back the sensor on to the cold air induction today I let it run for about 5 minutes and check the plugs after I shut it off and they were starting to carbon up. I noticed when I shut the car off that it doesn't hold pressure in the fuel line by watching the gauge that I installed on the fuel rail.I could get the pressure regulator to turn down any past 38lbs. I'm completelly lost .

I have a 190 fuel pump on there , its not more then a year old

Ok I'll have to describe the sensor alittle better, It just takes air readings. I put that back into its original spot on the air intake tube leading to the throttle body. I talked w/ Pro M and they were the ones that had given me the idea to move it to the lower intake in port runner 5, there was actually a spot on the intake to take out the plug and place the sensor into there. Check it out on the Pro M website its in there tech advice. You made a good point about chyanging injectors, I went from 24's to 30's so I had to change the Mass air also. I'm thinking its the computer I still have the stock computer at this point. I'm leaning towards getting a tweecer or PMS. Thanks again for the help.