Thread: Starting issue

Originally Posted by getLuke

Relay swap didn't make any difference so now the lack of hearing it prime makes me think its the pump itself.

And I would consider myself a beginner at any mechanical level, but happy to give things a crack.

Any hints with the swap? I found this guide that will be useful I think!

TD5 fuel pump maintence and repair tutorial

Appreciate your help mate!

And another good one www.discovery2.co.uk / TD5 Fuel Pump replacement.

your symptoms sound very much like what I had years ago. The techs started at the pump but eventually fixed it with the injector seals.

Get or borrow a fuel pressure tester. Or have a look at the flow. I ended up with no flow.

You can see by the electric load if the pump is working only on LP, see this : Disco 2 - Check Td5 fuel pump HP | LandyZone - Land Rover Forum , you can try to replace the air bleed valve in the filter head's rear outer port(WJN500110) cos that's another common cause for staring issues, maybe you are lucky, if the plastic bit in it is full of black soot then the copper washers are the big suspects as they let combustion gas into the fuel return rail

Originally Posted by Bohica

Get or borrow a fuel pressure tester. Or have a look at the flow. I ended up with no flow.

Good point, I'll test that too.

Originally Posted by sierrafery

You can see by the electric load if the pump is working only on LP, see this : Disco 2 - Check Td5 fuel pump HP | LandyZone - Land Rover Forum , you can try to replace the air bleed valve in the filter head's rear outer port(WJN500110) cos that's another common cause for staring issues, maybe you are lucky, if the plastic bit in it is full of black soot then the copper washers are the big suspects as they let combustion gas into the fuel return rail

Cheers mate. I was getting a reading of 22.90 so i'd say thats all good too.

Originally Posted by getLuke

Cheers mate. I was getting a reading of 22.90 so i'd say thats all good too.

IMO the pump is OK then

I wonder if it could be the glow plug(s) failing?

This would be consistent with having to wait with the key at ignition II, but this does not explain why the fuel pump is only heard intermittently priming.

Also, as an update, I have tested the fuel pump relay with the nanocom and its heard clicking.

However, the last two days on trying to fire the engine, I can no longer hear the fuel pump? I need to cycle the ignition a random amount of times (sometimes only 2 or 3, or sometimes I am sitting there for 3-4 minutes cycling the ignition to get it to fire up).

The new pump should arrive tomorrow and I'll look to replace the retaining ring also.

Time dependant I may have another update over the course of this week, or worst case on the weekend.
Also, I am giving all these updates so that in the future should someone be reading this they see an outcome. So many forums get to dead ends and you never find out what happened! its like the sequel that never came

Appreciate all your help.

Originally Posted by sierrafery

IMO the pump is OK then

I trust your judgement mate, but check my response above this one. The pump can only heard priming after multiple cycles of the ignition - would this be consistent with a failing pump?