Wifes zetec idled a little rough.
I changed the plugs and also the wires and the car runs smoother. Had only 70K kilometers, the plat plugs needed changing.
Also did the fuel filter. The fuel filter is very easy to change as the fuel lines just clip on. Run the car and then pull the fuel pump fuse to depresureize the fuel line.
Filter is located close to right rear wheel (passenger side).
