Please help me narrow down sputtering/stalling causes, I've checked a few already

[silverlake69]

95 Altima with 55,000 miles- Eratic sputtering/loss of power sometimes stalling up to 4 times, always restarted. I've searched other posts and have done what I could. First off the ECU led light will not give me anything, it will clear the check engine lightly briefly but will not light up. The alternater was tested and is good. The fuel filter was replaced. I took off the distrib. cap and rotor and cover, it is very clean no sign of oil. Cleaned the MAF with MAF cleaner. I've found now that it sputters like crap at 2000-2500 RPM and if held there will occasionally cut out and die. I've run out of options to do on my own and have to take it in, we need the car and it's become too dangerous for my daughter. Earlier when they did have it, they were unble to duplicate the problem (it's become worse now) but they had said it's either the MAF, O2 sensor or anti-knock sensor, or fuel pump. What should I have them do or not do and in what order? I don't think it's a pump at 55,000 miles? Sounds like MAF problems are more related to issues from other defective sensors? From what I've read here it seems like this is an ongoing problem with Nissans, but it looks like I'm going to end up buying some pricey parts.

[JoeShmoe]

Well if its not throwing a light i doubt it one of the sensors. I would replace the O2 sensor that is located in the headers. This sohould help, http://www.partsamerica.com/ProductD...pe=291&PTSet=A
All you need is a ratchet, and an oxygen sensor socket. The socke t is less than $15 but is really the best and easiest way to change the sensor. The fuel pump, is a bit harder. The best way to get to it, is to remove 2 bolts screws the hold the rear bench seat in place. They will be located under the seat (lift up the seat's edge to see them better.) The seat slides right out after the screws are off. You will then see a black metal plate with about 6 screws. Take them off and then you will see the top of the fuel tank. You can undo the lid by turning it counter clockwise. After that you can pull the pump right out and replace it. I highly doubt that it is to blame, but i'm trying to help.

[Toolman5523]

put a new mass airflow sensor in it, they go bad all the time, many times with no codes.

[XISDA1]

Have you tried to simply change the distributor cap and rotor. It only takes a tiny crack in one of those things to cause a problem.however if you're not getting the check engine light for a misfire then i dont know