tractive-effort wrote:Well I found the problem ( a mechanic friend did anyway!) It was in the diaphragm piece on the top of the injector pump - there's a little piston that travels up and down that responds with the load on the engine. Bosch put out a mod on these a few years back apparently due to the qualities of low-sulphur fuel causing the piston to seize in it's cylinder. The modified one is of a more durable material apparently and with this fitted it has literally transformed the van (along with the EGR valve mod too no doubt). My mate says there can't be many smiley front 2.5di Transit's around that HAVEN'T had this mod done....
where did you get the diaphragm from
