FORD 2004 Mustang v.2 - Manual (Page 218)

1 The PCV valve is a critical emission component. It
is one of the items listed in the Scheduled
Maintenance Guide and is essential to the life and
performance of your vehicle and to its emissions
system.
For PCV valve replacement, see your dealer or a
qualified service technician. Refer to the Scheduled
Maintenance Guide for the appropriate intervals for
changing the PCV valve.
Replace the PCV valve with one that meets
Ford material and design specifications for
your vehicle, such as a Motorcraft or
equivalent replacement part. The customer
warranty may be void for any damage to the
emissions system if such a PCV valve is not
used.
2 For spark plug replacement, see your dealer or a
qualified service technician. Refer to the Scheduled
Maintenance Guide for the appropriate intervals for
changing the spark plugs.
Replace the spark plugs with ones that meet
Ford material and design specifications for
your vehicle, such as Motorcraft or equivalent
replacement parts. The customer warranty may
be void for any damage to the engine if such
spark plugs are not used.
Refer to Vehicle Emissions Control Information
(VECI) decal for spark plug gap information.
2004 Mustang (mus)
Owners Guide (post-2002-fmt)
USA English (fus)
Maintenance and Specifications
218