Kz engine keeps shutting down

Hi all I have been having intermittent problems with my 95 hiace. It has a kz turbo diesel engine. Every now and then the engine shuts down. When it does it will start when cranking but won't run. I toke off an injector line it is pumping fuel while the starter is engaged but as soon as you let the starter off then it stops. There is a clicking sound from the timing control valve on the fuel pump when the engine won't start. If I leave it over night then it will start and run find for any where from 20 mins to a couple hours.   I have checked all the sensors and they seem to be fine. I checked all the wires from the sensors to the ecu as well they seem to be fine. It seems something is pressuring up and a sensor is cutting the engine then when it bleeds off then it is ok. I found that there are 3 screens on the fuel pump one behind the fuel temp sensor it was clean, one in the fuel return collector it was very dirty and I thought that was the problem I cleaned it and made a number of 15 to 20 min runs and then today it died again. There is another screen behind the spill control valve but I will have to remove the pump in order to get the spill valve out.
Anyone have any thoughts before I pull the pump out.
Thanks a bunch

Hi Steward,

Did you have any luck fixing this issue? I am trying to troubleshoot a van which has a similar problem.

Cheers,
Gabe

Yes I did, I had to remove the fuel pump in order to get the spill valve out. Under the spill valve there is a screen pack you can lift out with needle nose pliers. Pry the steel ring off and there are 4 screens and filters there clean them and then pout it all back together it has not run this well for a long time.
The spill valve is very hard to get out I ended up having to make a wrench and removing the pressure head from the pump to get it lose.
Hope this helps gabe
If you go to youtube and type in the pup model there is a good video that shows you where all 3 filters are on that pump and shows you how to clean them.
Steward

Thanks Steward. I'll give this a go.

Basically this van will turn over when cranking but wont run. It's a very consistent problem compared to yours, which makes me think it could be more ECU related.

mine would do the same it would fire as long as the starter was engaged but not when disengaged I think ECU bypasses the sensors when starting. If I left it set over night it would start in the morning and run for a few minutes then nothing until it sat for a few hours. The spill valve filter was letting fuel n but not out and it would over pressure I think.
Steward

Good info to have, thanks Steward.