air lock after sitting

hi,


i have just replaced all of the fuel lines and pump in my land rover, because the original daihatsu engine lift pump was broken, i used a facet electric pump and it works well.

it primes easily and runs great, however. after sitting for a few hours, it seems like air has entered the system, it’ll still start without bleeding. however will miss and smoke for about 10 seconds until it gets fuel again. i know the smoke isn’t anything to do with the health of the engine because once the airlock has self bled. it runs perfect. and if i manually bleed the system before starting. it doesn’t smoke.

obviously, this means that air is getting in the system somewhere. but i find it weird that it’s fine when running and only happens when stopped for a few hours. where would you suggest to look first? All of the lines have been replaced so i wouldn’t expect any pinholes. my first thought is the inlet to the lift pump. and the air floats to a higher point when stopped?

any suggestions appreciated.

thanks.

Have you mounted the facet pump correctly?
If these are not correct they flow back.
(Post phot if you have 1)

Unsure on daihatsu engines. Could be leaky pipe or copper washer problem

Hicap phill said:

Have you mounted the facet pump correctly?
If these are not correct they flow back.
(Post phot if you have 1)

Unsure on daihatsu engines. Could be leaky pipe or copper washer problem

Click to expand...

yeah, its in the right direction so the ball valve should work. that's why I think the leak is before the pump?

I have mounted it on the underside of the frame upside down. would that make a difference?

thanks

woo0003 said:

yeah, its in the right direction so the ball valve should work. that's why I think the leak is before the pump?

I have mounted it on the underside of the frame upside down. would that make a difference?

thanks

Click to expand...

I always put the nut(where the internal filter is) at the bottom. You can have a slight lean on them. Iv nerer put them up the other way though.

If you turn the pin on does the fuel go straight to the filter & out the need screw?
Does the pitch of the pump change before starting g the engine?