TD5 Starts & Dies (Sorry long post!)

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cliffbase

Member
Posts
25
Location
Cambridge
2000 Defender which has done 167k, been a great truck.

Recently had to replace the alternator after some very deep wading in mucky water.

Over the last week its not been wanting to start, initially thought it to be a dirty connection on the starter trigger wire, cleaned it up but little difference.

When trying to start it, with the key in the crank position, nothing - but leave it there and after a few seconds it cranks & fires. Having checked for power on the trigger wire it has 12v each and every time, so thats all good.

Yesterday i had to use it for towing (something i rarely do but it spent a couple of hours pulling reasonable weights around). At one point it struggled to start but sounded like fuel starvation, ie. started & very lumpy, stalled & had to crank for a while to restart - Never done this before.

So this morning, i removed the starter, took it apart, cleaned it up, cleaned up the copper contacts in the solanoid, & refitted. All good turns over beautifully. Started up and drove about 20 yards before stalling.

Now every time i try to start it it fires and immedietly dies.

Can hear the fuel pump priming, and have changed the fuel filter today, lots of fuel being pumped from the rear, tried the purge thing but still no go. Had some oil in the red ECU connection a couple of months ago, cleaned this out & its still dry & clean today.

So any ideas? sorry for the long post but thought id give you all the details, i read somewhere that the ecu takes an earth path through the starter? Ive tried attaching an earth strap directly from the starter housing to the battery - but still no go.

Just seems strange that its started doing this at the time the starter played up?
 
Just taken the ECU out & opened it up (took longet to do that than remove the starter!)
No sign of any ingress but cleaned & dried out, but sadly still no go.
 
Ok all fitted back together, tried fuel purge & it started & ran for about 15 seconds, then it dies again, it seems to now do this after every purge???

Making me think fuel again...
 
you need to check fuel pressure, it needs 4bar to run, yours symptoms sound like the fuel pump has issues
 
Sorry just remembered when it was running, it has been hesitating at full throttle, only under load, take the trottle back a touch and it was fine, could be related...
 
When did you last change the fuel filter? With the recent panic buying of diesel the garages ran their tanks very low and all kinds of ****e was pumped out with the fuel.
Its the cheap option before replacing the fuel pump. You also need to check that the pump can deliver a steady 60+ psi to the regulator at all times. A weak pump can show a static pressure but is not able to keep up when the engine runs.
 
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