I have 2003 f250 6.0 today I noticed that my check gauge light came on and my oil pressure gauge was reading 0. But when I take off the gauge will go back to normal. I have a scan gauge 2 hooked up also to monitor certain things and I notice my icp at idle is at 632. So my question is what would make that oil pressure gauge read 0 at idle on the dumby gauge. Plus I also notice that when driving it I get some shuttering around 55 then it goes away. There is no problem with throttle past 65. Any help would be great plus thanks in advance.

 

Can you post a picture of the engine - specifically the oil filter?

What I am wondering is if you have a tall (aftermarket) oil filter housing cap. If you do, in combination with an OEM size filter, some amount of the oil will drain straight to the crankcase and you will seriously hurt the base oil pressure.

 

The oil filter is the oem filter. I use motor craft filters

 

My MAIN question was if the oil filter CAP is the oem one. You didn't answer that question .............................

So let's assume the cap AND filter are OEM. You then have 5 main options for a cause of the 0 reading on the gauge:
1. a switch issue
2. a gauge issue
3. an HPOP issue (the "pressed in" ball bearing can pop out of the suction side of the HPOP and cause low base oil pressure).
4. an LPOP issue
5. an LPOP regulator issue

Probably pulling the regulator first makes the most sense. If there is trash in it, then you need to determine what the trash is and where it came from.

I suppose you could also have a base engine problem as well, but let's hope not.

 

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