well the base idle has been set and I have no dump valve I have just fitted a brand new iscv and had the fuel mixture set and it is a little better. It only sounds like popping from the exhaust, have been told that I could do with a new tps as when unplugged it seems to idle even better bearing in mind that I am very fussy and want the car running right.Anyone know where I can buy a new (not second hand) tps as ford tell me that this part is discontinued