Remove the harness holder (A).

Check the PCV valve (A), the hoses (B), the pipe (C), and the connections for leaks or restrictions.

At idle, make sure there is a clicking sound from the PCV valve when the hose between the PCV valve and the intake manifold is lightly pinched (A) with your fingers or pliers.
If there is no clicking sound, check the PCV valve washer for cracks or damage. If the washer is OK, replace the PCV valve and recheck.

Technical Information
The diagrams in this section give you the dimensions and capacities of your vehicle
and the locations of the identification numbers. It also includes information you
should know about your vehicle ...
Rocker Arm Assembly Removal
Remove the cylinder head cover.
Loosen the rocker arm adjusting screws (A).
Unscrew the rocker shaft mounting bolts two turns at a time in the
sequence shown.
...
Rotor Slip Ring Test
Measure the resistance between the slip rings (A):
If the resistance is within the standard, go to step
22.
If the resistance is not within the standard, replace the roto ...