We currently have a 2004 mazda 6 turbo diesel in (95,000 miles), which will randomly cut out, mostly at idle, and then can be difficult to restart. We changed the fuel filter (which clearly has not been changed for eternity) and found that it was in a pretty bad way. It has improved the starting fault, although not cured it. This fault has got considerably worse over the last week, and just to add, there have been no fault codes recorded up to now.
I have read similar posts about this fault, and it seems that the pumps are an issue on these. I have tested the low pressure side fuel flow, and have found it to be less that 1 litre a minute (regardless of engine revs). My understanding is that any common rail LP side should deliver around 3 litres a minute. So my question is, is this the fault they suffer with, or is it a combination of this and other faults?
Thanks in advance...