ECU help

[TBoDelSol]

i need some help with my ECU as you may of read b4 my car died and i charged the battery and my car would just turn over but not start. I found out that im not getting power to my ecu/ not sending power to kick the main relay.
I have Checked:
Battery
Starter
Ditributor
Ignitoin
Replaced the ECU with 2 different ones
Replaced teh Main relay with 2 different ones
Check fuel pump
Replaced Fuse board

[punkr6]

check your grounds,expecially the one on the motor near the thermostat

[TreyMan]

Did you check the ECU fuse under the hood?