oil warning light

I have a 1997 sunfire 2.2. After the car warms up and is sitting in idle my oil light comes on when you acclelerate(or rev the engine) it goes off. I noticed that any time it goes uneder 1000 rpms is when the light comes on. I checked my oil and it is full. I have done an oil change on it and still no help. any suggestions on what it could be...

Check the oil pressure sending unit should be located above the oil filter. Change it with a new one to see if you have a problem or try a mechanical guage. It is possible that the oil pump is going bad but doubtful.

I have the same problem...I replaced the oil pressure sending unit....The light still went on under 1,000 rpms.

So i installed a oil pressure gauge on my dash...and sure enough i've noticed oil pressure going down to zero.

So i did the next thing of installing a new oil pump....
Thinking my problems will be solved....

The oil pressure still goes down to 0. So now i have no idea what is going on...