Oil Pressure Gauge

[2nd99Eddie]

99 5.4
My oil pressure gauge is acting strangely. After the oil change, and not even a 1,000 miles later. The gauge wouldn’t come up. I checked the oil. It was only on the tip. I put 2 quarts and it came back up to normal or maybe even a little more.
Since the added oil. It seems like the gauge won’t move until you put it in Drive. Then it will stay in the normal range. Dead in the middle. The oil level is on point.
Today I notice it being a little slower.

What could be causing this?

 

[Billme]

I would check the the connection, especially if it’s oil soaked in the area..If it still does it after cleaning, then check wires, or just get a new sending unit..

 

[2nd99Eddie]

Could you provide a picture was where this is?

 

[Billme]

How to install a real oil pressure gauge in a 5.4 (with pictures)

I tried to hook it up directly to the engine but couldn't find the right adapter. The only sandwich adapter that you will want is the one with all 1/8" NPT ports. Most of them come with oil cooler ports that you will have to block off and 1 NPT. The sleeve in the stock mount stays in there and...

www.expeditionforum.com

 

[2nd99Eddie]

How to install a real oil pressure gauge in a 5.4 (with pictures)

I tried to hook it up directly to the engine but couldn't find the right adapter. The only sandwich adapter that you will want is the one with all 1/8" NPT ports. Most of them come with oil cooler ports that you will have to block off and 1 NPT. The sleeve in the stock mount stays in there and...

www.expeditionforum.com

Thanks but that was for the 3rd generation Expeditions. Not sure if they are the same but I’ll look.

 

[Billme]

Pretty close to the same area..
Search function is a little funky
Plenty of YouTube videos as well, on what to do ..

 

[Petesexpy]

Change your sending unit. It's easy. BTW, that gauge does not show oil pressure. It acts only like a warning light - it's either in the middle or on zero. My bet is sending unit. It will take 15 minutes to change.

 

[Bruce Mitchell]

My oil pressure gauge acted strange a little while ago. Where it used to come up right after start, it would take a bit to register. Shortly thereafter it started oscillating while cruising at highway speed. Mechanic noticed it, too. Checked the oil pressure; it was good when checked.

A couple of weeks later the engine seized. Oil pump failure.

 

[Billme]

@Bruce Mitchell
What oil have you been using.. Have you made a change, like going to protect and restore?
Just curious..

 

[2nd99Eddie]

My oil pressure gauge acted strange a little while ago. Where it used to come up right after start, it would take a bit to register. Shortly thereafter it started oscillating while cruising at highway speed. Mechanic noticed it, too. Checked the oil pressure; it was good when checked.

A couple of weeks later the engine seized. Oil pump failure.

I believe that’s what happened to my blue Expedition and yes I might have neglected it just a little.
I was doing a lot of traveling and then pulled a good size load. Then hours later, as I was going to my house. It started making a noise. The radio was on. Turn it off. As I was on the accelerator the noise was worse. The engine eventually shut off. I coasted to the exit and off on the ramp.

This one at least doesn’t fluctuate while driving and does stay at normal.

 

[jamie1221]

My oil pressure sending unit on my 2000 Expy went bad and started leaking. The gauge would go up and to zero randomly. I couldn't clearly see where it was in an obscure place on the passenger side of the block. It killed me, but this repair was done at the dealership.