Further to my earlier post for which I thank all who replied I am trying to work out how to replace the diaphragm in the plenum chamber of the fuel pump. Unfortunatlely neither the Haynes book or the CD work shop manual I have bought even mention that this componant exists. Can anyone shed some light on how easy/difficult this task is and if there is a manual which will guide me through it. I don't really want to shell out £100 for an OE workshop manual only to find it's too big a task and have to pay someone else to do it anyway. Many thanks for you help.