Could the relay box be what's making my car want to die? on 1994 Oldsmobile Cutlass Ciera

My battery in my car died. So my car sat for 3 months. I keep having things done to it, thinking it's this and that what is wrong with it. The battery died and had it recharged recently. But my car keeps wanting to stop and not run good. When I am stopped at lights, it makes chugging sound and sometimes it dies and I have to restart it. I was told, it could be my relay box. That the points on it are sticking. Could that be the problem with my car? My brother who is a Certified Auto Tech., said it's probably a sensor. It needs to be checked. I called Sears and they told me, in order to do that, the engine light needs to be on. Sometimes it's on, and then it isn't. Does that light Have to be on to do any kind of testing? I need my car. And I need to know what I should do to get it repaired.

by in Naples, FL on August 15, 2012
1 answer
ANSWER by on August 17, 2012
The best thing to do is to have it diagnosed by a reputable repair shop, or your brother if he has the diagnostic equipment.