Do not touch them if you do not even know where they are located.
no glow plugs
Unless your ford focus is a diesel your car does not have glow plugs.
You may be refering to the glow plugs. They help the engine turn on.
there are 8 glow plugs
there are 8
glow plugs do not fire glow plugs are used to heat the chamber where the diesel ignites diesel is not ignited by a spark diesel is ignited thru compression
they are under the valve covers
glowe plugs on 1996 ford e350 .7.3 diesel are under valve cover
the glow plugs are located under the valvecovers should be 8 of them
8... there is one per cylinder
glow plug timer is bad or the glow plugs them selves are bad
Depends on which diesel you are talking about. A 1993 or earlier the glow plugs located outside edge of the heads below the valve cover. 1994 through early 2003, the 7.3 turbo diesel engines the glow plugs are located in the heads but under the valve cover. You will need to remove the valve cover to retrieve the glow plugs. Basically the non turbo diesels have the glow plugs outside edge of the heads. In all turbo diesels you have to remove the valve covers to get to the glow plugs.