Oil Pressure Gauge Fluctuates...

[Andy1416]

Hello everyone:

I have a 89 Bronco II 2.9L v6 and my oil pressure gauge fluctuates when it the truck reaches normal operating temperature. I have a rebuilt engine in the truck and I have replaced the Oil Pressure Switch for the Gauge, The Oil Pump and also the Oil Pickup Screen and Tube.

Does anyone have any comments or suggestions pertaining would could be wrong or in need of fixing? I made a GIF file of the fluctuation so you all can see it. Any help would be greatly appreciated and thanks everyone for your help and support.

 

[duffy]

The electronics technician in me says that the movement in the gauge itself is bad.........

 

[JerryC]

Bad gauge or bad connection. Hook up a mechanical gauge and see what you get.

 

[Andy1416]

Thank you everyone for the help, issue has been fixed.

 

[duffy]

and, what "fixed" it? Inquiring minds would like to know.

 

[Andy1416]

I had to fix a decent amount. I had coolant contamination from cracked heads, so I replaced the heads, gaskets. and bolts. I also replaced a bunch of other important gaskets. And I also cleaned out my oil pan and replaced my pickup tube and pump. Now it's perfect.

 

[duffy]

So it was actually a pressure problem.....never seen one jump around like that. However I've also never seen an engine with water in the oil. Learn something new every day.