Mine now tends to 'stick' - keping the pump lever off of idle and engine rpm
up too high with result that engin espeed flares on gear changes - this all
gets noticebly worse when the engien bay gets hot like after a 'high' speed
run i.e. 65MPH :)

It looks like a long run there under the van - Any tips on changing the
accelerator cable on an 82 Diesel van?

Steve