Symptoms indicates a fault in the system and the first thing you need to do is to get a scan done to check for trouble codes to understand what is causing the problem.
It could be a list of possibilities and the scan would show you the way to go.
Most parts stores provides free scanning services but being a diesel vehicle, not all scanners are compatible so you might need to scout around for the correct one.
Ford diagnostic scan should be a 1 hour job rate. To be accurate, try calling them up to check the prices.
Friday, January 6th, 2012 AT 7:20 PM