Starting issue td5

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ruttingstag

New Member
Posts
5
Help needed! Here is my mechanics report, he is at a loss on where to go to next!
During the last few months, it had begun to play up. Sometimes it would not start, then away it would go, and all would be well again. During this time, I both mot'd it and carried-out routine servicing. Whilst with me, it ran as normal.

More recently, I attended it at Matt's house because it would not start. More by luck than judgement I played around with the "yellow" relays beneath the driver's seat, swopping several of them around, and "hey presto", the engine started and ran as normal again.

This situation only lasted for a few days before it packed up again outside his house. This time it just would not re-start, so I recovered it to mine.

Its original battery was clearly past its best so I fitted a new one. Additionally, I have renewed all (four) "yellow" relays beneath driver's seat (genuine Land Rover parts), checked all its fuses ok.

The in-tank fuel pump can be heard to work but to make sure, have connected pressure gauge at its outlet connection with fuel filter housing, Data book says this pressure reading should be 3/4 bar approx. (10-12 psi). Indeed, this is the reading I am obtaining. I have not checked the fuel pressure at the engine because I am not familiar enough with the TD5 system to do so. Although the data book shows an unclear diagram and expected reading of 4 bar if all is well.

When I "plug into" the diagnostic socket, I am getting a constantly present fault code of 0120 "can error/can link fault". I make the assumption that this would relate to a more recognisable fault code "U0120", this fault code will clear, but comes straight back again once the engine is cranked again.

If I look at "live readings" when cranking I am seeing a rpm reading of approx. 230 rpm so this would suggest the crankshaft sensor is ok.
 
What diagnostic tool are you using? The TD5 is not OBDII compliant so the common ones will not work and if you can get anything at all, will give erroneous results.
Have you tried bump starting it? The reason I ask is that some starter motor faults can give enough electromagnetic interference to affect the crank sensor signal and prevent start. Bump starting does not use the starter and so allows the engine to start without interference.
Have you tried bleeding any air out of the fuel through the purge system?
 
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