HELP! 300tdi Injection Issues!

Hi

I'm brand new to LRing and having a few issues so thought i'd get involve with the forums cos i know there's always experts hanging around somewhere.

I've had my discovery for about a month and just yesterday It started badly missfiring. My first thought was that i was running low on fuel (it read 1/4 tank but that's the lowest It had been since i got it) but i filled it up and it wasn't low fuel. Still had the problem with missfiring gradually getting worse till eventually it just stopped. Occasionally it would restart but only running on 1/2 cylinders before cutting out again. Thought maybe some dirt or water had got into the system so drained the filters and only small amounts of water in them.

Trying to prime and bleed the fuel system was proving tricky and I found that air seemed impossible to remove fully. I got most of it back out but there is still some left in the top of the algae filter (between the fuel filter and pump) but the engine does run at the moment but not sure for how long. Is it normally quite difficult to prime the fuel system? Should there always be air in the top of the algae filter? Does anyone know what could have caused the initial problem? I was thinking maybe there could be a crack in a fuel line letting air in although a visual inspection reveals nothing.

Any help would be awesome

cheers Paul

check your fuel sedimenter, its on the chassis leg behind the o/s rear wheel
in front of the fuel tank, either clean it out or remove it and join the pipe up

Thanks gegs88,

I checked that the day I had the problem. It had a small amount of brown water in it but not enough to warrant a problem.

Still having a few issues but its much better. It has trouble starting in the morning after its been stood overnight. After a while it starts and runs fine for the first 2 mins then chokes up and dies. After a few more minutes of trying to start it runs fine again. Very strange.

Does anyone know if there are any problems with a return valve on the fuel pump? It seems when fuel is stood in the filter for a long period it drains out somehow. Just thought maybe its going straight through a return valve thats stuck open.

EDIT---- Been reading up on this and alot of people keep mentioning the stop solenoid. This sounds like it could be the problem. Any ideas on ways of testing it or repairing it?

Cheers

Stick a new lift pump on (not a cheap one) and change the fuel filter.

I had the lift pump off to test it. It all seemed ok. Gave it a good old clean out and checked for suction all seems to be ok.

I'm in Greece at the moment so looking for a service kit to change all the filters. Only changed 6 months ago but better safe than sorry what with Greek diesel too. Does anybody have any ideas were to order parts which do good international delivery?

i have a 300tdi and have a problem along the same lines, but not as bad it miss-fires splutters and on the odd time its cut out with engine check light flickering but starts first time and runs ok-ish
checked all above, new lift pump etc .. so will be keeping an eye on this thread see if you get sorted.......

howie4x4 said:

i have a 300tdi and have a problem along the same lines, but not as bad it miss-fires splutters and on the odd time its cut out with engine check light flickering but starts first time and runs ok-ish
checked all above, new lift pump etc .. so will be keeping an eye on this thread see if you get sorted.......

Click to expand...

could it be caused by a vacuum in the fuel tank,not sure on this model,is it a sealed tank or open to the atmosphere.

sounds like air in the system to me, check pipes on top of fuel sender unit under the carpet in the boot. or the injector spill pipes

Re: HELP! 300tdi Injection Issues!
sounds like air in the system to me, check pipes on top of fuel sender unit under the carpet in the boot. or the injector spill pipes


Hi Mike, injector spill pipes? were do i find them :doh:

howie4x4 said:

Re: HELP! 300tdi Injection Issues!
sounds like air in the system to me, check pipes on top of fuel sender unit under the carpet in the boot. or the injector spill pipes


Hi Mike, injector spill pipes? were do i find them :doh:

Click to expand...

There on the sides of yer injectors
This is a couple of photies from a 200tdi but it'll give ye an idea.....

The plastic type....



the plastic and 'cloth' type.....



It would be a good idea to change the copper washers if ye take them off

Right then,

Seems to be running better after a couple of days of starting and bleeding. Still doesnt like to start but eventually it does.

Just something i noticed....I disconnected the fuel return from the injector pump and started the engine fuel came through with good pressure. So out of curiosity I put my finger over the end and fuel started ****ing out of the first injector spill pipe. Is this normal? Cant see or feel any fuel coming out of it with engine running normally.

As a matter of interest can you just replace the tube bits on the "cloth" ones.A couple of mine are on their last legs
Cheers
Paul