Fuel pressure dropping

[sapote]

Alright. I was able to rule out the FPR. New pump installed, and things are back to 100%. DO NOT BUY that Hella fuel pump made in China. /sigh

Then the pump is too weak.
But why the DME shown error code 0x01 about the pump relay? I'm surprised bc the DME doesn't know the pump status nor the relay. Maybe TIS wiring diagram missing the wires.

[BRiley]

Then the pump is too weak.
But why the DME shown error code 0x01 about the pump relay? I'm surprised bc the DME doesn't know the pump status nor the relay. Maybe TIS wiring diagram missing the wires.

It was quite a brain buster for me. But glad it’s done. Than you again.