Hello everyone, we run a 2005 daf 75 320 as a plant delivery vehicle here in sunny Jersey , and about 6 months ago the starting issue started. It will not start off the key in the mornings but as soon as you put the jump pack on it will wind itself and eventually start.
So far we’ve had all ther charging system checked…ok…
Starter …ok…
Ecu’s…ok…
New o’rings in the diesel pumps…
This you can imagine is really starting to get on my nerves and the boss is starting to get sick of throwing money at the ■■■■ thing…
Have the batteries been checked out? As it is 2 x 12v batteries for the 24v, one of them could have a cell down or another problem.
I’m guessing you would need to check them individually as well as together. Or you could just replace them with others for a short while and see how you get on.
Is it down to the cold weather or other conditions?
So when you turn the ignition on do you leave it to warm up those diesel thingies, um, glow plugs before starting, then how long do you spend cranking it compared to how long with the battery pack on.
Are the batteries the right CCA spec for the vehicle, and are you able to try some batteries with a higher CCA to test?
So…what does it sound like when it starts?
Does it splutter into life or does it fire up like a good un when it does?
Why do you need the jump pack if you have new batteries?
Are you running them flat trying to start it? If you are,do you keep winding the starter motor?
Tis hard without actually hearing it or seeing it.
It’ll turn over untill they go flat, put the boost pack on it and it winds over for around 6 to 7 seconds then starts and runs sweet, it will then start all day without any problems…
See,it could be that the alternator isn’t charging the batteries enough,the starter maybe weak but you’ve checked that or maybe even it isn’t getting fuel and by continually winding it you are getting the fuel up but by the time it does the batteries are flat.
Fuelling,change the filters making sure the ‘o’ rings seat correctly(smear a bit of engine oil on em).
Air getting into the system.
Pump shagged…why did you change the ‘o’ rings?..You’re not using that cheap chip fat biodiesel are you?
Pump timing.
Injectors.
Try some easy start…If it fires straight up with that then it’s fuelling.
Don’t just keep winding the starter though,you’ll bugger it up.
My mate was DAF aid but he pulls out of Purfleet or Tilbury now.I’ll ask him next week.
Could there be a valve in the fuel system that is not working allowing diesel to run back to the tank and therefore you have to crank the engine to bring the diesel back up
ianto:
Could there be a valve in the fuel system that is not working allowing diesel to run back to the tank and therefore you have to crank the engine to bring the diesel back up
Thats what I was going to suggest, I had a Merc Atego that did this and it turned out to be the low pressure vale was shagged.
Open the injector pipes as if you were bleeding it the put some pressure into the fuel tank when the deisel is coming through retighten the injector pipes.
ianto:
Could there be a valve in the fuel system that is not working allowing diesel to run back to the tank and therefore you have to crank the engine to bring the diesel back up
Thats what I was going to suggest, I had a Merc Atego that did this and it turned out to be the low pressure vale was shagged.
the starter motor in the photo is specific to your lorry,www.bisonparts.co.uk Part No: BP03-038
if you look at the photo,you will see a wire going from the top of the starter to the main body.
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check both ends where it connects, they have a tendency to rot as they are exposed to the elements and make intermittent contact,hence your starting issues. it is a known fault on leyland dafs.
The electric side of things has been checked and given a clean bill of health, i’ve been told by the dealer to put a non-return valve in the main feed close to the tank to stop it losing pressure, a cheap place to start…
hsr2.6:
The electric side of things has been checked and given a clean bill of health, i’ve been told by the dealer to put a non-return valve in the main feed close to the tank to stop it losing pressure, a cheap place to start…
Then there is your answer,he obviously thinks the diesel is draining back and you winding the batteries flat to get the diesel up.
I still have to ask why you changed the seals in the pump?