cant work out whats wrong with my fiesta its a 97 1.3 duratec the old ohv engine with the efi unit when driving along it seems to lose power a little then when i take my foot off the gas and press it again its ok and driving at around 60 mph it seems like a sort of miss /jerking even when i take my foot off the accelarator it seems to still jerk some times it cuts out at junctions aswell tapets seem noist too any ideas anyone cheers