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Hi There acormabbot, Is this a petrol or a diesel thanks ,
does it cut out approching junctions ?
Hi thereCustomer, Ok the fault lies with the vehicles speed sensor , these are a common fault on the 1.8 old shape petrol focus , , this also effects your speedo gauge,
this sensor is located on the rear of the gearbox and has a 3 pin multiplug going to it ,
this sensor is held in by way of a small roll pin and this gets damaged when removing the old one ,
so buy a new roll pin when your getting the sensor , i think the sensor is around 25-30 pounds , and the pin is about 2 pounds ,
also on these engines check for any burst or split breather hoses around the inlet manifold , these can be identified by listening for a hissing noise , and can be traced by hand , this usally causes erractic idle or high idel
i hope this information will help you out
if you need any more help on this please let me know
if you are completley satisfied with my answer please click ACCEPT
Kind regards Brian