Changed fuel Filter now its stuffed

squidy2k · May 18, 2021

discovery 2 2000 td5 auto

So changed fuel filter didn't fill the new fuel filter with diesel all the way to top them primed it heard the pump started the car all good then 2 mins later it dies so i know there is an air lock somewhere in system but i dont where the bleed nipple/valve is or if there even is one

tried to prime/purge it again and crank to bleed the air outta but to no luck

and m/s have started flashing meaning a fault of some kind and now the fuel pump isnt working as probaly due to low battery

anyone know how to get this air lock outta the system and what the fault codes could mean

cheers for the help

Colthebrummie · May 18, 2021

Although I trained as a diesel mechanic years ago, I try to avoid Diesel engines if I can. I thought engines of this vintage were all self bleeding.

Col

Stanleysteamer · May 18, 2021

squidy2k said:
discovery 2 2000 td5 auto

So changed fuel filter didn't fill the new fuel filter with diesel all the way to top them primed it heard the pump started the car all good then 2 mins later it dies so i know there is an air lock somewhere in system but i dont where the bleed nipple/valve is or if there even is one

tried to prime/purge it again and crank to bleed the air outta but to no luck

and m/s have started flashing meaning a fault of some kind and now the fuel pump isnt working as probaly due to low battery

anyone know how to get this air lock outta the system and what the fault codes could mean

cheers for the help

https://www.landyzone.co.uk/search/144586935/?q=purge+diesel+system&o=relevance&c[node]=8

tilly2 · May 19, 2021

You have an air lock in the head fuel gallery. Same thing happened to my lads Defender TD5. Stuck in a fuel pressure gauge, in the fuel temp port, and bled the air(foam) out. Started up perfectly afterwards. No amount of purging cycles would shift the air.

neilly · May 19, 2021

Another choice, is your fuel pump is knackered on the HP side, and is only running on the LP side. You can disconnect the inlet on the FPR and check the flow rate .
flow rate for both the HP and LP side of the pump is written in the Rave manual, ( i do not have access to it on this computer) .
I have had this happen.

Cheers

tilly2 · May 19, 2021

HP pressure at the fpr is 4bar.

squidy2k · May 19, 2021

tilly2 said:
You have an air lock in the head fuel gallery. Same thing happened to my lads Defender TD5. Stuck in a fuel pressure gauge, in the fuel temp port, and bled the air(foam) out. Started up perfectly afterwards. No amount of purging cycles would shift the air.

would a fuel pressure gauge be needed or could i use something else as i dont own one
and also do i just bleed it until disel comes out

tilly2 · May 19, 2021

You could just loosen the FPR temp sensor, and that might allow the air to come out. Mine was just yellow foam, and lots of it, until liquid fuel came out. A test gauge is only about 19 off ebay. All it will allow you to do is press a button, and the air will vent off.

squidy2k · May 19, 2021

ok cheers anychance u know the location of the temp sensor and which exact pipe it is picture would be lovely if possibly as ive search online can cannot seem to find it

tilly2 · May 19, 2021

Its screwed into the fuel pressure regulator unit, on the side of the engine block, to the rear.

squidy2k · May 19, 2021

tilly2 said:
Its screwed into the fuel pressure regulator unit, on the side of the engine block, to the rear.

ok cheers hate to be annoying but theres multiple pipes and im not really a mechainc thanks

tilly2 · May 19, 2021

Then this methods not for you mate... Dont take it the wrong way.

squidy2k · May 19, 2021

tilly2 said:
Then this methods not for you mate... Dont take it the wrong way.

mate im mechainc in training and i have work in 30 mins and i need a car to get there im ****ed up the car the for last 3 days and im on my last nerve with this thing as i need as runnign car

sierrafery · May 19, 2021

Do this easy test cos it can be relevant: Disco 2 Check Td5 fuel pump HP

raywin · May 19, 2021

Just one thought, when you took the filter off did you remove the old sealing washer in the centre?
They are known to stick to the housing and in the past people have popped the new one on without checking so then you have 2 washers and it stops the filter sealing correctly.

squidy2k · May 20, 2021

tilly2 said:
Its screwed into the fuel pressure regulator unit, on the side of the engine block, to the rear.

Hey Mate I've done what u said I got the fuel temp port out and diesel has now come out of it but still wont start. dose it have something to do with m and s flashing that it wont start now

squidy2k · May 20, 2021

raywin said:
Just one thought, when you took the filter off did you remove the old sealing washer in the centre?
They are known to stick to the housing and in the past people have popped the new one on without checking so then you have 2 washers and it stops the filter sealing correctly.

could this casue the lights to flash and not to start as i took the fuel filter off again there was fuel in it

sierrafery · May 20, 2021

The M+S used to flash when the battery is low and if it is the engine doesnt start even if it cranks well

janderson41 · May 20, 2021

I,m with Fery on this. You really need a good battery to keep the m and s lights at bay.

raywin · May 20, 2021

squidy2k said:
could this casue the lights to flash and not to start as i took the fuel filter off again there was fuel in it

It can cause air in the system, which gives running problems, and is easily checked, just to eliminate one possible cause.

Changed fuel Filter now its stuffed

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