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.

 

[Challenger RTA]

Only thing comes to mind. It's not getting constant pressure. Air bubbles. Purge gauge line might help.

A high-rate bouncing oil pressure gauge typically indicates one of three critical issues: system pulsation from a failing dampener or relief valve oscillation, air contamination (aeration) due to low oil levels or suction-side leaks. Low oil level in oil pan.

 

[Xcudame]

One of the things I love about Mopar big blocks is that the pump is bolted in the outside. And it sounds like you're going to appreciate that too when you swap in new one!