Thread: I'm at a loss

Josh do you have constant 12V power to the pump????

If so are you sucking rubbish into the pump???

Did you check out the old pump before tossing it.???

I assume your hitting the pump because its stalling or seizing???

Just some ideas

Justin

what was in the fuel filter?

your fuel pressure regulator may be sticking open..

elec connection to the fuel pump... replacing the fuel pump wont fix it if its just getting an intermettant connection somewhere.

how is the fuel filter and all the subsequent fuel lines?

bloody useless v8's hey pedro :P

ignition module been checked?

Haven't checked anything else as yet and no haven't got the other pump as had a workshop do it for me but going to call them in the morning to see if they still have it.

Will try to check the other things tomorrow... anything else?

Try pinching off the return line to the tank,will indicate if the fuel pressure reg is letting all the pressure back to the tank and not the injectors.
The trusty multigrips got me home one night in our XE EFI Falcoon we once owned!!!
Andrew

i had a similar problem on my ol'mans lexcen......the fuel pump died......
i fitted a new pump and it almost pumped a full tank of fuel before it too died.....
so...after removing the new pump to fit another new pump.....we noticed the power plug on the actual
pump (in the tank) had loose connections and was arcing....it proceeded to burn out the terminals till they wouldnt make contact.....

so....before fitting the second new pump.....replace the connector and made sure it had good contact......
the thing is still running......many tanks later......


so...try checking as many connections as you can and see if any are burnt.....

another trick we used to do was.....run a wire from the fuel pump back to the dash and connect a small LED to it......
if the car stopped and the LED was still lit.....it eliminated all the wiring up till the pump.....

a fuel pump doesnt NORMALLY cut out whilst running.....it wont work after the engine has been switched off......
so...you are driving...all is well.....then you switch off......and it wont start.....

reading your first post again......it sounds like coincidence your pump packed it in when it did......

it may be something else which is heat related......or affected by heat.....
such as coil.....air/vacuum leak.......fuel pressure reg as mentioned above (very common).....ignition module....?

there are many things it can be......the problem is its intermittent.....which means you simply guess at a common problem......
replace that component...cross your fingers and see if plays up again......
if it does play up again......you change another part......this is where dealerships benefit.....
they have other cars they can BORROW parts from.......till they track down the problem.....or even transfer it to the other vehicle........


connect also a fuel pressure guage along with the LED......it will tell you where to start looking for the problem......

Does the disco have the fuel pump at the tank or up front?
I had very similar problems with a vn commodore... went to replace the fuel pump (which is inside the fuel tank) and the bottom of the tank was full of sugar....
The symptoms were: the car would run happily for about 20-30 mins and then buck under load or high road speed before cutting out completely. A 15 min rest and it would be ready to go again.
Whilst its probably unlikely you've go the same deal, perhaps the bottom of your tank is full of water or other crud like DRanged suggested?