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llessur

Member Since: 15 Nov 2011
Location: Hereford
Posts: 151

Non starting possible fuel issue

All help appreciated !
I have a 2.4 TDCI. (The wifes) The engine died whilst driving. The engine cranks on the starter but does not fire at all. Not even any smoke out the exhaust. I checked for error codes, but non recorded or pending. Thought it might be the VCV so I replaced it. Then tried bleeding the fuel but one disconnecting noticed no fuel in the line. Bled to the blue connector, connected up and no start. Tried leaving the clear tube bleeder inline and on cranking there is no fuel being sucked through. There is an electrical connector on the fuel pump, (as well as the VCV) Is this something to do with the fuel pump operation ? Do I need to check any fuses / relays?
All the lights come on as normal in the dash, everything seems to operate normal with no abnormal temperature reading when switched on. Have swopped cam and crank sensors with working Defender just to check.
Was wondering if it is worth changing the fuel filter in case it has sucked some crap out of the tank and now offers too much resistance for the pump to overcome. Thought about air leak in fuel line, but would this not show as a leak (puddle on floor)
You can see I am getting desperate, and as you might guess marital harmony is suffering.
Can you suggest anything pleeeeease! ( divorce is not an option...........yet )

10th Sep 2020 2:41pm

llessur

Member Since: 15 Nov 2011
Location: Hereford
Posts: 151

So in addition I have now changed the fuel filter, checked the relays under the seat are all pushed in firm. The orange engine management light is illuminated so I presume there is power to the ECU. I now have clean fuel with no bubbles present in the clear plastic pipe I have added to the blue fuel line connector going to the pump, but no smoke on cranking the engine from the exhaust. Now my only thought is whether the VCV I replaced is faulty (£30 new off ebay) and I need to buy a Denso or Genuine LR (twice the price but maybe you really do get what you pay for)
Can I slacken a connector on the fuel rail to check the VCV is working ?

10th Sep 2020 6:08pm

mk1collector

Member Since: 17 Sep 2009
Location: West Yorkshire
Posts: 6769

Can you hear the fuel pump prime when switching the ignition to position 1? Ray
My build thread
http://www.defender2.net/forum/topic17615.html

10th Sep 2020 7:24pm

llessur

Member Since: 15 Nov 2011
Location: Hereford
Posts: 151

No noise in position 1 but I have never heard one previously. Forgive me but I thought the Fuel pump was just the mechanical on the engine with no electric pump in the tank (2.4 TDCi)
Does anyone know what the green connector ( not the VCV connector ) on the Fuel pump does and if I can test it ?

10th Sep 2020 8:19pm

L110CDL

Member Since: 31 Oct 2015
Location: Devon
Posts: 10513

This maybe a outside of the box thought, but could it be the immobiliser, if you have an alarm fitted ? 1996 Golf Blue 300Tdi 110 Pick up. Keeper.

Clayton.

10th Sep 2020 9:01pm

llessur

Member Since: 15 Nov 2011
Location: Hereford
Posts: 151

OK so the Green connector is temperature sensor - I will rule that out then.

10th Sep 2020 9:02pm

llessur

Member Since: 15 Nov 2011
Location: Hereford
Posts: 151

Thanks
I will try an immobiliser bypass , at this stage I will try anything, but I thought the immobiliser would stop the engine cranking.

10th Sep 2020 9:05pm

landy andy

Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 5422

2006 Defender 110 Td5 USW Zermatt Silver

I didn’t think the 2.4 had a tank pump, so had to have a special tool to bleed fuel ?

Does the 2.4 have a crash sensor for the fuel system.

10th Sep 2020 9:16pm

L110CDL

Member Since: 31 Oct 2015
Location: Devon
Posts: 10513

I'm no expert, but i think from memory that a mate on a Td5 i think had this, it would crank, but not let it start

1996 Golf Blue 300Tdi 110 Pick up. Keeper.

Clayton.

10th Sep 2020 9:20pm

landy andy

Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 5422

If it is the immobiliser then the light in the instrument cluster would normally inform you

What is immobiliser light doing?

10th Sep 2020 10:24pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 16879

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

landy andy wrote:
I didn’t think the 2.4 had a tank pump, so had to have a special tool to bleed fuel ?

Does the 2.4 have a crash sensor for the fuel system.

No pump in tank, no inertia switch on a.2.4

10th Sep 2020 10:30pm

landy andy

Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 5422

That’s what I thought. So the OP will need to get priming device to bring fuel up to the engine.

10th Sep 2020 10:32pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 16879

Blowing hard into (or connecting an airline to) the tank breather works just as well.

10th Sep 2020 10:40pm

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

blackwolf wrote:
landy andy wrote:
I didn’t think the 2.4 had a tank pump, so had to have a special tool to bleed fuel ?

Does the 2.4 have a crash sensor for the fuel system.

No pump in tank, no inertia switch on a.2.4

is where not crash sensor built in to 10 AS for 2.4 engine

11th Sep 2020 8:34am

llessur

Member Since: 15 Nov 2011
Location: Hereford
Posts: 151

So this morning I applied the bridge to the IPAC - no change
Swopped IPAC with another 2.4 - no change.
No immobiliser light on and 10AS locking working as usual by the way.
I also went around the earth connections and added a couple for good measure.
Going to swop 10AS and Engine ECU from another 2.4 tonight, just to rule those out.
I also inspected the engine wiring harness and could not see anything but considering swopping that at the weekend, if no success before.
I know I have fuel to the low LP side of the pump, so in my mind as I am not getting any smoke out the exhaust on cranking, it could be the LP / HP pump, pressure in the fuel rail or triggering of the injectors, but please if you can think of anything else, shout up. Still wondering if I replaced a failed VCV with a duffer that does not work also, so if my skinless hands recover a bit I might try taking the VCV of the running Defender and try it on this, but its a real pain with fat arthritic hands.

11th Sep 2020 10:46am

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