Please help me. I have a fiesta 1.25 zetec suffering from juddering /misfire problems when accelerating ,it happens in all gears.I broke down in heavy rain last week when the car started juddering over 50mph and felt like a loss of power, aa came out as i could not restart the car. They fitted a new coil pack and car worked fine for 40 miles till the juddering come back , this time the enigine warning light came on.
I put the car in to a local garage and they stuck it on a machine to clear the fault and find out the error code, it come up maf sensor so they fitted a new one the cleaned the computer again.The engine warning light has now gone and not come back but the juddering has. The car starts fine which it did not with warning light on unless i gave it some gas for about a min else it would cut out. I spent £140 on it so far , and totally lost where to go next. Would new leads and spark plugs help as they not been changed for 3/4 years. car has had new air filter and oil changed in the last 3 months