Erratic oil pressure

[Avalanche]

Has anyone had this issue?
It's a 440, but the oil pressure is about 60psi. Only weird thing is the pressure gauge bounces back and fourth at a high rate. Trying to find out what can cause this.
Thanks

 

[pschlosser]

electrical?

 

[Avalanche]

electrical?

Don't think it's electrical. Have a mechanical gauge inside the engine bay that's bouncing around.