Freelander 1 Stuttering on start up?

Hi, my freelander 1 (05 hippo) has had fuel supply issues for at least a year. I've had the high pressure, low pressure, tank pump and injectors o/h / replaced.
I've bypassed the sedimenter as it was leaking through the o-ring and I wouldn't say we need it in the UK.

Once running I've got no issues, and it'll turn over first times as many times as I like. But when I leave it overnight to go cold or in the work carpark it loses prime or something.

It's still stuttering on start up and firing fuel out the exhaust. Sometimes I have to throttle it and it takes a few turns to go. It's definitely running a lot better than it was but turning over is a nightmare.


Any ideas?

Have you had any diagnosis reading to narrow it down. There's a few sensors that can hinder fuel flow as also to simple filters and air leaking on the injectors rail. Check first for fuel leak or air ingress sucking on the return line to the tank.

There is no tank pump on an 05. Just a LP in the wheel arch and the HP driven from the timing chain.

Check correct unit was installed in tank.

Could well be on the LP pump side - if that is not feeding enough pressure to get your HP pump up and running in the morning… are you sure the pump was replaced and not just the filter?

Can you read live data? If so, get the pressure readings and post on here. From memory, you’re looking for ~350 KPA on the LP side. That can rule the fuel pressure in or out of the problem.

Could also be the O ring on the regulator of the HP pump - these are known to fail. But you say you’ve had that replaced also, correct?