I have a 93 GXE automatic with no mods(just the family car). I love this car and have done all the work on it. It has 150,000 miles and all of a sudden began to stall all the time. Not sputter like bad gas, fuel pump problems or fuel filter stuff but just quit,as if you pulled a plug. It does it spuratically and will start right back up. All the auxiliary lights, blower and electrical parts work but the engine quits. I tried the O2 sensor, plugs, plug wires but nothing. I broke down and took it to the nissan dealer but they could not find anything. The diagnostic did not show anything. I have had it back 4 times and through it all replaced the ignition coil, distributor, eng cont relay, had the injectors cleaned and the diagnostic test. IT STILL IS STALLING. The gas mileage is down but it runs like a champ. There is no difference in driving performance. It will cut out at any rpm, accelerating or decelerating. The nissan dealer is beginning to fish for ideas. I am looking for a place to start looking before they have me replace the engine piece by piece.

 

I will bet money it is the catalyc converter.I had the same problem the nissan dealer told me it was the coils then I replaced them still kept doin it no one knew I took it to 3 more mechanics they said it was the detonation sensor.So all else fails I take it to the 76 gas station and they tell me it is my cat.After a while the car looses all power and will not go anywhere have them check out the cat immediately.