this is kinda funny my a/c hasn't been working on the 1 and 2 settings and while that isn't working the oil pressure gauge works regular but when the a/c does work on all settings the oil pressure gauge doesn't work as it usually does?...the car runs fine i was just curious i think its just the Power FC...help?

 

oh new info i just noticed that both the a/c and oil pressure gauge work at startup and for about 5 minutes but then they both stop working right after that.

 

Off the top of my head, the only thing I can think of that might cause the problem with those two items is a bad ground somewhere.

Get the factory wiring diagrams and see if they have a common ground point or a common harness connector somewhere.

 

Correlation doesn't guarrantee the relationship.
The A/C probably is related to your PFC.
I assume that your indicated oil pressure drops to zero or near zero at idle after the car reaches operating temp? If so, it's usually traced to a dirty connection at the sender and/or a bad sender.

 

thanks guys ill make sure to check those connections