A PCV is used to consume crankcase vapors in the combustion process instead of venting them to atmosphere. Fresh air from the throttle body is supplied to the crankcase, mixed with blow-by gases and then passed through the PCV into the intake manifold.

If you remove the oil cap does the pressure drop?

no not even with the air fillter off

My car does the exact same thing with the oil pressure gauge and has been doing it for about 2 years now. I am 99 percent certain it is the sending unit because if the pressure was going that high I would have oil spraying out of seals. So I agree with Willren, for the cost it would probably be cheaper than paying for a manual pressure test and having him tell you the same thing... sending unit (most likely.....no gaurantee implied ). I am just sitting on mine for a while, to me it is just not a priority if it is doing the same thing all the time.

How do you know it'* fine?

i did replace it and it is doing the same thing

How about the gauge then, does it read correctly?

Sorry, missed that part about changing the sender already. At this point it is advisable to get a mechanical pressure test done. This way it is going to give you a warm fuzzy (know what I mean?). If the pressure is fine then it is time to look at the gauge itself. When I worked at the dealership we had special tools to check pressure gauges. It was basically a variable resistance dial that we would put at a particular resistance and then check to see if the gauge lined up with what was dialed in. Not so easy anymore. Darn, miss having access to Special Tooll # *********.

If the oil pressure is actually high, there are a few possibilities here. Oil pressure is usually dictated by the bearings themselves (crank and cam), the more wear, the less oil pressure (seeing that pressure is a inversely propertional to flow). The maximum oil pressure is set by the pressure relief valve located in the oil filter bracket assembly. If your pump is working fine and bearings are good and the pressure relief valve isopening properly, the oil pressure will be good. If the relief valve is not opening properly then pressure is capable of increasing with the increase of RPM (flow) without a change in restriction (relief valve) (it is a formula).

The other area that may be a restriction could be the oil filter. What brand have you got and how old is it?

Long and short of it....pressure test with a gauge. With that you know you are safe.

the oil fillter is a X2 from fram brand new and the oil is full synthetic oil 10w 30