So mates i am desperate.
The pump of my f4 does not work while it is hooked on my bike.
But... when i connect the pump direct on the battery , it works like a charm.

Before you tell me that the relay is the problem , i have to tell you that when the deposit has almost no fuel, the pump starts working .

I need an opinion about this because i am very confused.

Thank you.

 

Are you saying you've followed the procedure in Section 5-37, pg119, of the factory Honda service manual?