Fuel Pump Tick

[DMT]

Just fitted a new Electronic SU fuel pump.

Initially had a leak on the suction banjo but I believe it is sorted now. The pump now pressurises then ticks about every 12 secs.

Is this normal for an electric version? Once it pressurises I assumed it should not tick at all. (The old pump did not tick when at pressure.)

I have blocked the pipe at the carb end to ensure that it is not the float chamber valves letting by.

Dave

[wilf]

Sounds normal to me - is what my (new SU) pump does. Just slight leakage through the internal valves in the pump.

[DMT]

Thanks wilf.

[dasadrew]

Just fitted a new Electronic SU fuel pump.

Initially had a leak on the suction banjo but I believe it is sorted now. The pump now pressurises then ticks about every 12 secs.

Is this normal for an electric version? Once it pressurises I assumed it should not tick at all. (The old pump did not tick when at pressure.)

I have blocked the pipe at the carb end to ensure that it is not the float chamber valves letting by.

Dave

Banjo leak on an electronic SU? That's interesting - see this thread from post 4 onwards:

https://www.socforum.com/forum/forum/stag-owners-club/soc-forum/793778-more-unknown-pipes#post794899

[DMT]

I just bought a electronic pump from Burlen. The ports have O rings in shallow grooves. My outlet banjo had a flat face with a copper seal ring. The inlet banjo had a grooved face with a steel sealing ring. The pump was pulling air in through the inlet fitting, the outlet seemed OK and no fuel leaks. Continual ticking. I replaced both inlet and outlet seal rings with fiber ones and all seems good. Just a tick every 12 secs. I have not yet started the engine since the replacement.
Dave