i have got a w reg 2000 year ford escort 1.6 16v zetec, has been fine untill the other day when starting cold the autochoke is not kicking in so it is running juddey for about 30 secs to 1 min untill it warms up any ideas? i have replaced the mass air flow sensor yesterday and it is more reponsive to drive but still having start up problems... cheers Dave