JRad405

My stock oil pressure gauge isn't sitting in the normal. It is a little whacky. It will go from the middle of normal to low towards the "n" or "o" and then go back to the middle of normal and then the needle will move around sometimes. I changed my oil pressure sending unit and it didn't seem to help. I have no idea what to actually do from there. I'm thinking its a bad ground or the connecting piece needs to be cleaned because I have been driving my car for about 10k miles like that and I don't have a knock or piston slap or and other abnormal noise. And I don't lose oil either, but I don't know if that would be a symptom of low oil pressure.

I read the oil pressure sensors are on/off switches so I was thinking that it could be just my gauge is just acting up due to age.

Some of my pcv tubes are cracked around the grommets, could that cause low oil pressure? I will probably replace them anyway, unless my engine is completely screwed.

Is there another way to tell if I'm running normal. I was thinking of running an autometer guage just to see where the pressure was sitting to know if I'm completely screwed or not.

I really do think it is a bad ground but it will have to wait until Tuesday for me to check that? By the way where would the ground connector be for this?

Endrance

I had an experience like that, it ended up being I had spun a rod bearing. How long has it been since your last oil change and make absolutely sure you have oil.

Xemeth

Have you actually checked the oil pressure with a mechanical gauge? First find out if you have proper oil pressure, then worry about an electrical issue.

JRad405

I definitely have oil. I just did an oil change and my car has never been without oil.

I will pick up a mechanical gauge and see if i get pressure. I guess the weird part is that the needle moves around.

yamanx

What is a normal PSI reading for a 4.6? (Thread jack)

WhiteFoxGT

20-45psi, with the oil hot @ 1500rpms

yamanx

Hmm seems like a pretty big window. I'm getting a mechanical oil pressure gauge tomorrow and just curious as to what levels of pressure I should see at idle and 2k.

2000BlkGtConvgobucks

My gt had the same exact problem last year except my cars "dummy switch gauge" would fall all the way down to 0 oil pressure during idle, and then it would just pop right back up to normal when i would accelerate. It scared the hell out of me. I installed a jegs mechanical gauge to find out i had no problem with my oil pressure at all, as im willing to bet that you don't either. Your gonna know so much more once you get a real gauge on your car. Good luck