Hi Mathew,

First of all congratulations on your first post on UKAT, It wasn't too bad........

An engine code would be useful, But, your tests are OK, to a degree, as far as they go with the equipment you have to hand however a better understanding of the operation of modern common rail diesels is essential as well as the correct equipment to test it with. Unfortunately you appear to have neither.

You could use a voltmeter to test for High pressure at the HP sensor but you need diagnostic comms with the ECU to make any further progress with this job.

The ECU will not fire the injectors until it sees a pre determined High fuel pressure.

Also these injectors may be Piezo or Capacitive Discharge.. Either way you can not test for voltage at the injector with a voltmeter. Idealy you need a scope with a low amps current clamp.

For these reasons I suggest you cut your losses and move on to something you are equiped to deal with and if you want to diagnose faults on these you need to think about training or self study plus better equipment.

This is not meant to offend you, I am just playing Devils Advocate.

HTH

Mike