Changing the fuel filter didn't really make much difference to be honest. The old one looked fairly clean inside it.
I can get a set of the Monark 273 nozzles for £74 inc p&p, and a local diesel specialist says they will fit the nozzles at 2400psi for around £40. As I said in my other post it almost sounds like I've got 1 injector knocking/"clacking" at 1500-2000rpm. And is even more noticeable on the tank of biodiesel it has at the moment. I think since disconnecting the cold start it has quietened down a little, but the knocking/"clacking" is still there. Only stops on over-run - i.e. when deccelerating when holding it in a lower gear (2nd for e.g.) it goes perfectly quiet when it falls from 2500 until it gets down to about 1500 and starts clacking again then.
I think 26 mpg US will be around 30 mpg UK, so about the same. Although I'm now getting about 28 since I turned the diesel screw up a bit - but at least it accelerates a bit now!
Worthwhile getting the new injectors for around £100? Is there anything else that needs replacing apart from the nozzles?
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