Thread: New Territory engine in D3, Engine System Fault, please help

Originally Posted by winaje

I don't believe so Ean, because if that was the case, I'd not expect to get diesel flowing from the correct pipe...?

I haven't studied the fuel system enough to offer D3 direct advice , but is it possible a return line is blocked or kinked and it has built up a back pressure type issue ?


I am only pulling idea's from problems I have seen on other engine's.


I recall reading where someone tried to adapt a late model gearbox to an early engine and they wouldn't talk to each other due to different software , your not trying to fit a late engine to an early car and that could be the issue ?


Best of luck


Cheers Ean

Thanks Ean. Fitting a EU4 motor in place of an EU4 motor, so it should work ok from what I have read and from what others have done in the same situation. At this stage I'm going to pull the tank tomorrow, and see what condition the filter/pump/sender module is in.

Originally Posted by winaje

OK, have just gone and plugged a 5m length of 8mm clear hose on the LP pipe that goes into the schrader valve, then run it into a new diesel plastic can. Cycled the ignition 5 times, and it feels like about 1.5 litres of diesel was pumped into the can. The LP pump is on a timer, about 20 seconds each time I think. Diesel was clean and free of bubbles. I can only assume therefore that the LP pump is working at least somewhat, and that diesel is passing through the filter, as I can't imagine that there is over a litre in the lines.

The saga continues...

I wouldnt go pulling the tank just yet if you are getting a flow.Can you remove the schrader valve and put a hose over that and check the flow???,assuming that isnt the test you just did.

Another thought,how long was the new engine out of a vehicle???? Its possible a mud wasp has blocked a fuel line and worth checking any fuel connections.Also make sure they click home correctly.

We get mud wasps in the trailers at work,you cannot get the brakes off if a wasp has made a nest in a fitting
Andrew

Its probably been covered,instead of reading back.
Have you got the D3 or Territory fuel pressure reg fitted???
Worth the check.
See if they are the same part no,Fuel Pressure Regulator TDV6 (VDO) 1357062 1387695 Island 4x4 - Specialists in Land Rover and Range Rover Parts and accessories for all models. UK and worldwide mail order.
Andrew

Originally Posted by LandyAndy

I wouldnt go pulling the tank just yet if you are getting a flow.Can you remove the schrader valve and put a hose over that and check the flow???,assuming that isnt the test you just did.

Another thought,how long was the new engine out of a vehicle???? Its possible a mud wasp has blocked a fuel line and worth checking any fuel connections.Also make sure they click home correctly.

We get mud wasps in the trailers at work,you cannot get the brakes off if a wasp has made a nest in a fitting
Andrew

Thanks Andy. I disconnected the quick release pipe that plugs into the schrader valve housing. The schrader is about 25mm from the connector. So as there is flow from the end of the pipe where it plugs into the schrader housing, I can only assume that there is flow into the housing and therefore to the HPFP intake itself. It's probably 125mm of hard plastic pipe from the schrader housing to the HPFP.

The new motor had all fitting connected up until I took delivery of it. It was sitting in a shed on a farm for a couple of months, under a rug. I've used all LR parts right to the schrader valve housing.

Where is the fuel pressure regulator you refer to? Is it mounted on the motor or elsewhere?

Thanks again.

Unsure where it would be,just know in any fuel injected vehicle that the fuel pressure regulator is very important.If its not working it allows fuel pressure to bypass back to the tank
I just googled the Frog Island one to get a part number for you to compare to what you have.I would have thought both engine versions would run the same unit.
Cheers
Andrew

OK, update: have tested fuel pressure at the schrader valve. It's supposed to be .6 bar, but it tests at .35bar. Have removed and refitted the new Bearmach diesel filter, it was full of diesel. Have bled the low pressure pipe from just before the schrader housing. Have used a bit of Aerostart, and the engine fires on the Aerostart. BUT it doesn't fire on diesel. So it seems probable to me that the problem is fuel delivery related. Ive been reading a document from disco3 that talks about the pressure control valve on the HPFP. It says: "In the event of a total failure of the fuel rail pressure control valve, the engine will not start." I have checked the voltage at the wires to this sensor, and it's 4.95v with the ignition turned on, and it does not change while cranking. According to the info, the voltage applied varies between 0 and 12v.

Does anyone know of a way to test this PCV? It's just a solenoid, can I safely apply 12v directly to it and see if the car starts?

Thanks again.

According to the WSM, the D4's 2.7 HPFP requires a supply pressure in the range of -0.3 to +0.5 bar.

During starting, the fuel rail pressure must be at least 150 bar. Do you have a gauge that can measure this?

Can you determine if the injectors are being powered?

Do you have diagnostics capable of showing the rail pressure?

Can you determine if the pressure control valve is being operated, ie not left open by the ECM? I suspect a pwm signal is used as the valve is variable position.

Can you determine if the volume control valve is being operated, ie not left closed preventing any fuel intake to the HPFP?