Thanks for that Jason. I will give these things a try. It's done about 5k miles since I switched to bio so the filter may well be clogged. I took a bit of a gamble that the pump seals were ok for bio as I believe 1991 (when the car was registered) was about the changeover period to Neoprene seals. I figured I had got away with it as no diesel was leaking out but maybe not... I'll post what sorts it when I find out!
Boots.
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