Metering unit valves

[simon.williams]

Hi, no idea what these are called, but they have little valves I think held in place with a spring.

I can only blow through one of them with compressed air. No sign of fuel getting through them.

Are these easy to change, and what about the two rear ones I can’t get to? They look a different design.

Thanks!

[simon.williams]

Ah, they were gummed up, pushing them from the bottom with a stiff wire freed them off.

Question still stands for the two inaccessible one though, do they have valves?

[Jonathan Lewis]

The back two injector pipe unions DO have non-return valves, but of a different design (banjo fittings).

Whilst memory might be playing false, I think the only way of dealing with those is to replace with better/new...

[simon.williams]

Thanks, might have to face facts that pump & metering unit need changing….sadly. At least engine spins!