Thread: Troubles with starting 300tdi Disco

in order

the leads off the fuel solenoid or the feed to it is gone.
the fuel filter is blocked or theres a leak inthe fuel line
the lift pump isnt lifting the fuel to the pump.
the fuel pump is leaking back (very rare on the tdi(x)00 Configuration but technically possible)

your smoke when cold may be sticking rings unless its black in which case it might be the boost compensator not doing its thing right, an intercooler hose failing, a wastegate stuck open,

and just because the glow plugs are working (or testing OK) doesnt mean that they are working, the driving relay might be stuck or you have a high resistance lead to the plugs.

Thank you very much! We'll attack it again tomorrow, it's beer o'clock now or Dad or myself may lose our tempers with it.

Originally Posted by redneck.woman91

We've bled it, and diesel is able to come of the injector pipes. So now we're at a loss.

With the high pressure line from the injector pump to the injector cracked at the injector, do you get fuel squirting out when cranking the engine?

Aaron

How much current are the glowplugs drawing?

Aaron

Originally Posted by Aaron IIA

How much current are the glowplugs drawing?

Aaron

It may be more important in Delegate than in Tuross to have working glow plugs, but inoperative glow plugs would definitely not prevent my 300Tdi starting.

You haven't told us what went before it not starting. I know, it'a a saga, and you have been chasing stuff all over, but was there one thing you did before it refused to start?

It can be very frustrating to chase a fault, and I know I can become fixated on something at the expense of all else. So, go back to basics.

I'd be looking at Dave's first point first:

the leads off the fuel solenoid or the feed to it is gone.

Check that there is voltage at that lead, or, run a wire directly to it from battery +ve and see what happens. Hook it up in such a way that you can unhook it quickly, 'cos if it starts you will want to be able to stop it...

Dave's third line is also important: (Yes, they are all important.)

the lift pump isnt lifting the fuel to the pump.



You need to be sure that the lift pump is off the cam, and then try and pump using the hand prime lever. Feel for resistance.

That's my two bob's.

Cheers for the replies guys, we had a fiddle with it today and with the injector pipes we get fuel, but Dad can stick his fingers in the flow at the time of cranking the engine and there's not a great deal of pressure. He did get it running with Start Ya #@!$%#* but as soon as it ran out of that, it died.

Your dad is very lucky, the injection pump is capable of pushing in excess of 5000psi at injection.

I'll let you google image diesel injection injuries.

if you're getting something out of the injection lines with no pressure it most likely means the main pump is not priming correctly and you have either a failed lift pump, a blockage or leak to the lift pump.

The boost compensator pin could also be stuck in the reduced fuel position or beyond which means you may have forced the governory bits in the pump into the low fuel position.

drop the return line off the injector pump and see what comes out of that when you crank it over.