Nissan Repair: 97 nissan altima stalls, crankshaft sensor, nissan altima

Question
hello
Two days ago I was driving on the local streets and my car began to sputter and it would not speed up and it would stall,if i turn it off and started again, it still not speed up, some times it does not start up, if i waited  20 to 30 minutes, it would start up again and I began to drive. It started acting up again and stalled.  I had a similar incident about last week. After circling the local streets(for testing purpose after  replacing the fuel pump)
same thing happed after  40 Mins,It seems  like when car reaches  to certain  heat level, it would be very hard to speed up and finally  not move at all, my friends told me it's either the timing related or the crankshaft sensor or the computer.
Thank you very much for your advise.

Answer
Jack,

Check the fuel pressure to make sure the relay that feeds power to the fuel pump is good.  Second, if you have fuel pressure and the car is stalling check the ignition for a defective coil or ignition module.  Email me back and let me know what you find.