Hello all, this is my first third gen ever and I'm used to working on older cars so I'll probably need ya a lot. I've got a 1990 Firebird Formula and among it's several problems the oil pressure is very sporadic (according to the gauge anyway). I know it needs a serpentine belt and either the alternator or P/S pump is squeaking. Anyway, the oil psi is on the higher side of the guage and its pretty much constantly jumping 5-10 psi. I'm only 15 so my knowledge is severely limited and I haven't a clue what it could be. If anybody has any tips as to what it could be I would greatly apreciate it.
Thanks
Alex

 

I think you have a sporadic ground for the gauge.

 

it seems G.M.s oil press. sensor is not the most reliable . it's located above oil filter . not too bad to replace , be careful with old brittle plastic on connector . bad sensor is the cause of most oil press. indicator problems . good luck .

 

Yes, it can be the sender, located behind the intake manifold, on the driver's side.

 

Alright one less thing to worry about! Thanks for the info.

 

Is this sensor above the oil level after the car is off and sat for a bit? Or is oil going to pour out?