Hello everyone, I was hoping someone could help out here. I own a 95 cavalier with 61,7xx miles. The car sat for about 6 months prior to my purchase. May had been started once or twice in those 6 months.

Now the problem is, once the car gets warm, it begins to idle rough and oil pressure light comes on for a fraction of second at a time. When I'm driving, oil light doesn't come on and the car runs prefect.

I was gonna try to swap out oil pressure sending unit. I used the search bar and someone had a similar problem and that's how they solved it.
Any help, suggestions or advice is greatly appreciated.