Isuzu 4hf1-1engine ECM type
im working on isuzu 4HF1-1 engine. It just wouldnt start after it was parked for just 1month. It cranks normally but doesnt run. Checked and found no fuel getting to the injectors from the pump. Because no power out from the magnetic valve wire harness in rotary pump. tried to retrieve the engine diagnose light in dash bord but no light flash codes at all, (no engine check light appeared) checked the ECM, good conditions no burn inside. I may be wrong but i think there's no constant power supply to the ECM. But All the fuses and relay ceck out fine. the ECM found under the compartment box in front. and has 4 multi plug connectors. Can anyone help me please?