Hi, I've just heard a ticking noise when on gas on my E8 260. I've been having a look and it sounds like a relay, BUT, when I hear the noise, the FPR light on sensors just keeps turning on and off. Is it the fuel pump relay? On my standard ECU I didn't have that issue... Well, at least that's what I think!
Any idea??

 

I think it's fuel pressure resistor.

Where the fuel pump switches from high to low voltage.