HELP!!!!!!!!!, Oil pump Options

[edo17982]

Hi all, today I was driving in highway and everything was going well....when I came back in city when I arrived at first light and had to stop I took a fast look to the gauge cluster and noticed a red light so I worried and turned off the car.
Then I restarded it and no lights went on...after a while I started to run again and when I stopped again I saw the engine oil light on!!
So I parked to analize the problem.
I shutted off again checked the engine oil quantity and was ok, not full but ok and no oil leaks at all.
I started again and no lights on but after about 10 seconds running at idle the light came ON again
I noticed that if I just rev to 2k or more RPMs the light goes off so the pump at 2k + RPMs work.
I thought the following possibilities:

- Oil sensor not working good.
- Oil pump not working
- Oil pump dirty

What do you thing guys????????????????
HELPPPPPPPPPPPPPPPP

[edo17982]

I've to tell you some thing about my engine condition:
like u can see in my profile it's pretty hard modded as a NA engine....
2 months ago my car started eating much oil, like a quarter each 700 miles, I'm pretty sure cause I have bad valve stem seals.
Anyway...I noticed in those 2 months when I start my car the oil check light doesn't disappear immediatly, but after 3 or 4 seconds and I can hear by the engine sound that just when the light goes off the oil reaches the head...so 3-4 seconds with no oil flow at cold start.......
It aid me to think that my oil pump is clogged or jammed.....