Oil pressure Gage showing zero

[WA_IrishPilot]

Check your wiring by grounding the sensor wire. If the wires are good, the gauge will read normal. If that doesn't help you find the problem, get a mechanical pressure gauge and see if your oil pressure isn't truly low.

Spott

changed all the oil, the pressure switch and filter. My uncle says I have a clogged screen and should take it in. Ugg, I hate this. Cold weather sucks.

 

[Andy D]

I would rig a mechanical gauge, just for test purposes. To get some real info. At 30 below, be glad it starts, let it idle for a few minutes.

 

[97ranger xlt]

changed all the oil, the pressure switch and filter. My uncle says I have a clogged screen and should take it in. Ugg, I hate this. Cold weather sucks.

if the engine runs for more than 5 minutes you have pressure.
btw trucks don't feel the wind chill factor only ambient temp.

 

[WA_IrishPilot]

if the engine runs for more than 5 minutes you have pressure.
btw trucks don't feel the wind chill factor only ambient temp.

Ambient has been -20*F below zero some days or nights.

I am able to run it for way more than 5 min. I am thinking it is a clogged oil pickup screen to the oil pump. As I have some pressure, just nothing normal.

 

[txgocartB3000]

And just how are you measuring the amount of pressure you do have?

I know it is frustrating but listen to what people are telling you.

Put in a mechanical gauge just temporarily if you do not want a permanent one.

Do not guess or go by the idiot gauge on the truck, know what's there in relationship to what your gauge tells you.

Ray

 

[wildbill23c]

The truck obviously has oil pressure or it would have been knocking and rattling worse than a diesel engine if you had it idling for 5+ minutes.

That dash gauge as well as all but the fuel gauge are just glorified idiot lights they give no true readings other than high, normal and low. There's absolutely nothing in that gauge that means anything really. The oil pressure gauge in my 88 F-250 would sometimes drop to zero while driving, idling, just randomly and of course that would illuminate the "check gauges" light in the dash. Truck ran and drove just fine, just some quirky sensors and gauges.

I installed an aftermarket gauge cluster for temp, oil pressure, and voltage because those gauges in the dash of my 84 B2 never worked anyhow.

My grandfather's 93 Ranger 4.0L was always noisy in the valve train even after having a bunch of work done to it. If the oil pump pickup screen was clogged you would certainly notice very fast as the valve train noise would only get worse not go away. You have oil pressure just so cold the gauges and sensors aren't working so well.