[Milktruck]

Been working on getting this to start and run…
Finally the car starts and will run if I prime by pushing the fuel distributor plunger down with key in for a second or two. It runs rough at low rpm and stumbles on tip-in. As it warms up the idle strengthens and will rev, but still stumbles down low.
I was sitting in the car as it warmed up and could hear a faint surging sound, so jumped outside to inspect. This is what was happening.
It’s a new pump and filter, but the accumulator has not been replaced. Tank was drained and cleaned and screen replaced.

R107 fuel package - surging sound

youtube.com

any thoughts?

 

[RaceDiagnostics]

Not sure about the sound, have you checked the fuel pressure and WUR warm up pressures?

 

[Milktruck]

I am headed to the WUR as my source of issues. I’ll going to try to pressure test this weekend. Also thinking I can/should check return volume (fuel) as well.

 

[karlhodgson036]

I would be checking fuel pressure in and return and make sure the tank is not pressurized or vacuum, get a sucking sound after a good drive when removing fuel cap.