I'm wondering if there is any way of knowing if the OMP is working like the OEM ECU , ICant tell by looking at the lines .

 

The stock ECU doesn't know if the OMP as a system is working. It has very primitive diagnosis of the stepper motor that regulates flow, that's all. It doesn't know if the correct amount of oil is actually getting to the housing surface, or rather it doesn't know if there's a clog or some other kind of failure.

All the PFC can do is tell you the voltage of the sensor "VMOP" and it will highlight that if the voltage is too low or too high.

 

disconnecting the oil injection lines and getting them to drip inside a metered container, run engine at a specific rpm for a specific time and measure the flow. I think this test method is in the FSM.