hot no start problem
 

i have a 92 honda civic 1.5l . i have a hot no start problem. After car is at opperation temp, and i turn it off and wait about 5 minutes, it will not restart. so far i have replaced the core that helped for about a week but then acted up again. so i replaced it again but no differance. i have looked up this problem on the internet and found that a relay under the dash goes bad and causes this, but i replaced it and it did not help. i'm getting fire. so i tried to check fuel pressure but there is no way to check it. so i changed the fuel pump, still no differance. i put a nowd light on the wires to the injectors and found that 2 are dim and 2 are really bright. so i tried the ignitor but no differance. so i tried a computer still no differance. then i tried coolant temp sensor. still nothing. can someone please help