02 Td4 Nightmare

Hi All
Had a problem starting herselfs 02 TD4 so We put it in to the local mechanic who said it was a fuel pump. already replaced one three years earlier, symptoms sounded the same so a fair guess I thought.
When the new pump was fitted the SRS light came on. Our mechanic said his diagnostic machine couldnt get in so we needed to take it to landrover.
€80 later landrover said they couldnt run a full diagnostic as there was a fault on the DCU. To proceed any further it would have to be changed -€700 but there could be further problems.
the engine will turn over but not fire now.
sometimes I can hear the fuel pump and sometimes I cannot on start up, could the new pump be faulty?
What i need to know is would the DCU affect the starting and running? If it was only €700 to get it running again would be the end of the world
Or could I put a second hand DCU in? landrover say no but wouldnt tell me why and in the past following company line sounded very similar to speaking with a forked tongue to me. Herselfs first freelander was a 1.8 petrol and after four new engines under warranty they still insisted it was just bad luck.
Does the immobiliser system stop the fuel pump working??
Or should I just bite the bullet and scrap it??
Any ideas welcome only I dont like herself thrashing my defender and cruising in it with her mates

Tell us a bit more about the starting probs......I.e. intermittent starting, turning over for a long time before starting, rough running etc.
There are a lot of cheaper causes before getting a new ecu.
For your srs light first thing to do is check the yellow connector under the drivers seat.

mjrimmer said:

Tell us a bit more about the starting probs......I.e. intermittent starting, turning over for a long time before starting, rough running etc.
There are a lot of cheaper causes before getting a new ecu.
For your srs light first thing to do is check the yellow connector under the drivers seat.

Click to expand...

Turns over and wont start. Was intermittent but now wont start at all.
It was ok for about a week after the new fuel pump was fitted. No lumpy or rough running ever just non starting. At first if you left it for a few hours and went back to it it was ok but progressed to non starting at any time hot or cold. I cannot always here the fuel pump when I switch the ignition on.
It was landrover who said the DCU was faulty and no further diagnosis could be made until it was replaced.

When turning the engine over was it taking a long time to start?
If so get a leak back test done on yer injectors.
I would also check that the contacts on your fuel rail pressure sensor are clean, There was also known problem that could occur with the harness from the ecu to the fuel rail sensor.
The camshaft sensor can cause starting problems but this normally begins when the engine is warm.
When was your crank case breather filter last changed?.......I don't know if it would cause non starting......but it can cause a whole host of other problems.
As far as I know the immobiliser would stop the car from turning over.
I'm sure someone else on the site who knows more about the engine will be able
Come up with some more options.

Sounds very similar to my problem last year - take a look at this thread and good luck

http://www.landyzone.co.uk/lz/f9/fuel-rail-pressure-sensor-harness-change-154473.html

if landrover diagnostic couldnt read ecu then it sounds like ecu fault or power supply fault,ecu can fail but it is not common

One possibility missed from that is the MAF sensor, if the injector leak back test doesn't give you a clue disconnect the MAF (under the engine cover).

Crank shaft sensor is another occasional starting fault, but you should have an engine warning light (not airbag) for the crankshaft sensor, you don't get the warning light for the MAF.

You mechanic might not be deliberately lieing to you, sadly in this age too may 'mechanics' are pavloved into using the diagnostic computah, instead of thinking like for themselves and solving the problem through elimination.

hello there what low side fuel pump did they change because theres 2 on the pre facelift models youve got the one on the nsf inner wing and also a tank mounted one they should be changed together as one with start to break down then stick strain on the other one which will give it premeture failure

when they plug it on the dianogstic comp it should have a fault say low side fuel pressure if its either of these 2

cheers mike

Thanks for all the replies
I am going to give it to landrover to change the ECU before going any further. I am loathed to do it but have no choice.