need help truck wont start

[stanseel]

hello everyone i hope you can help me. i have a 1987 suburban that has a 350 with tbi. it will not start. i thought it was the tps because it was surging. i changed that and it will not start. so i went about changing damn near every part on the truck trying to get it running. so far i have rebuilt the tbi, changed the fuel pump, filter and the inline fuel filter. i read the icm might be the culprit so i had mine checked it passed but just to be safe i replaced it with a new one. i am not getting pulse at my injectors. i checked purple/white wire from the dizzy and it has continuity. i checked the voltage at the fuel injector pigtails and i am getting three volts on the drivers side and 1-2 volts on the passengers. im at a total losee here and i hope you guys can help.
stan