Thanks to those who responded to my question about the oil pressure on my 93 Lumina APV. After reading up in my shop manual I thought maybe my high oil pressure readings might be related to a clogged PCV valve. However, when I tried to replace it I was not able to. The manual says depress the cover and turn 1/4 turn counterclockwise to remove the cover to gain access to the valve. I cannot depress or rotate the cover at all. I suspect it may be jammed in the depressed position? Also the manual says remove the "sight cover" from the manifold and fuel rail before the step referred to above. I do not see anything that looks like it could be a "sight cover" whatever that could be. The only thing in the way is the FI wire harness.
Any ideas?
Thanks