its taken some time but i think ive sorted this van out.after taking the whole wiring lomb out & checking it i did find some corroded terminals in a block connector in a plastic box mounted on the n/s/f inner wing,i cut the wire & soldered them together as there is not much spare wire to play with,two of the wires went to the air flow meter,if i remember correctly one was pink & the other brown.did this repair mid june & took the van to le mans & back(with spare afm under seat)& is still going o.k.hope this helps. Tony