check all your pipes and hoses for splits, if o.k the problem will almost certainly be your idle control valve. this is mounted on the lower throtle body,with a muliplug fitted to it. sometimes removal strip and a good clean with carb cleaner does the trick. remember to clean the chamber that the valve fits in too. when you strip the valve to clean mark the valve and the valve housing as it can go together two different ways. takes about 40 minutes to do and if successful could save you around £90.00
ian, August 2009