Thread: Td5 fuel filter.

After replacing a leaking/cracked fuel filter block on a mates 2001 D2, we couldn't get it to bleed/fire. After flattening 2 batteries while jumping from my D2, I was worried we'd kill the starter. A tow start at resonable pace down the grass air strip he lived near finally got it started.

Couldn't work out what the issue was, new filter block, air bleed valve, filter, lines all cleared and checked for leaks (when not realising it was block that had the leak). Also had the FPR out and checked the mesh filter.... fuel pump had been changed a year earlier but I didn't have a pressure gauge then.

Had us stumped, we'd run the purge cycle probably 10 times..... I even pulled a couple of glow plugs to check they worked...

Lots of white smoke will towing and turning the engine over, some fuel was getting through....


Since then I've replaced many fuel filters, an air bleed valve and a couple of FPRs..... never had an issue like that vehicle had.... all have purged with the normal cycle and fired up......

Hope this helps.

Cheers Discofender

Mine has never failed to purge previously, when the system has been disturbed, usually only needing the pump to run for a couple of times without the five pump protocol.

No movement from the tacho, does that definitely mean the CPS has gone bush?

check wiring first.
Unusual for it to just let go especially just after you fixed the FPR(same area) ... so, could be a pulled wire from plug or something really simple.

But yes, no tacho on crank = no CPS signal.

Thanks Arthur.

Agree with Arthur, mine did that and I found the wiring to be quite brittle and fractured at the connector at the bell housing. The CPS is pretty reliable, but just in case some Jag ones fit.
If it is the wiring and you choose to replace it get shielded wire because the proximity of the starter interrupts the Hall effect of the CPS and makes the car slow to start.

From what I've seen, CPS isn't overly expensive(compared to some other parts!) ... so if found to be not working, it's not going to break the bank.

The prices seem to vary wildly, depending on where and what quality you're prepared to settle on.
Temu et al start at $24 with free delivery, genuine was over $400 + ex-UK.
I settled on a name brand (Delphi) for under a hundred in the letterbox, from Karcraft, who were recommended by Mario.