hi about ur key problem somtimes when a new battery goes into key the car needs to be reset or the key remap into the programe again take it to fords dealer and they can do it unless un got dianogtic equiment
hi that happend to my ford fiesta its the crank posistion senor it at the front ofthe car down by the gear box if u take it out and clean it and put it back it may work if not then a new sensoris about 20.00 pounds it hold on by two t30 torx bolts
hi i got a ford fiesta mk3 si its a 1.4 cvh engine n reg its failed the mot on emmision on the fast idie test and also it runs funny could anyone tell me what it is thanks brad