1992 chev lumina 3.1 eng. cuts off intermittently. sometimes when driving down the highway and others when idling around a carry-out resturant. Put in neutral and it starts back up. I have replaced the battery, starter, egr valve ?(spell) small idle motor and I believe that is all...any sugestions? Cuts off just like turning the key off! Please advise.

DO you have any engine codes still remaining? IF car restarts right away its gonna be tricky finding out what is dropping out. Engine codes are the best clue to start the hunt for problem. From experience however, I have had a few of these come in for same symptom. There are two wires that run from Ignition module/coil pack to the crank sensor, insulation falls off and they melt to each other or to hot engine, intermittent short disruption of signal, hence car stalls whenever wherever and restarts right away.