Fuel Pump??
 

G'day All,
Had the stethoscope on engine yesterday & noticed a pronounced ticking sound in the brass (?) fuel lines either side of the engine. Could also hear it with stethoscope on adjacent air plenums.
Is that a normal sound in the fuel lines? Or could it be some other vibration (?) that is shaking the engine parts around?
Thanks in advance,
Matt

It's your injectors firing............

Aha, thought it might've been but being new to this I thought I better check!! Thanks