hear is a link for the repair of a 8v wur the 16v one is similar but has diagram for enrichment and the screw for adjustment and a second spring it acts on http://www.jtresto.com/e21/WURServicing.pdf
Car is now sorted. Replaced the fuel pump, accumulator, filter. Ran it for a few trips up to Scotland and back, still had the cold dstart issue but it was getting better. Then replaced the WUR with an old working one I had (the dodgy one was full of black crap) and after a few tanks of optimax and injector cleaner everything is fine. Starts as it should and runs well, the crap must have all been blown through the injectors by now. Moral of the story - CHANGE THE FUEL FILTER
