hi all hope all well. i have an s40 t4 which has a low speed hesitation, does any one know what it might be. i have fitted a new fuel pump cleaned pressure regulator filters, replaced fuel filter checked fuel pressure, new air flow meter, new coils, car runs ok no problems when accelorating hard, but has this odd hestitaion at low speed like a flat spot, when u try and keep the speed constant ie take foot of gas then gently put back on seems to misfire. i have also checked the tps no fault codes at all, cleaned throttle bodie and idle control valve. pls help its driving me mad, thanks any help would be great