Was having trouble with my 95 altima,it was stalling after running for about 20 mins.After changing all most everything I broke down and took it to the nissan dealer.Problem was diagnosed as faulty distribritor,so after 3 weeks of trial and error they will replace it for $900. dollars

the problem most likely was oil leaking in the distributor causing problems with the sensors inside. for that year the only true fix is to replace the distributor. I fixed mine with gasket sealer.