My 2.4L Altima is running great most of the time but will start missing and running rich sometimes. It will then die and crank over but won't start until it sits for a few minutes. It runs great for another day or so before doing it again. Is it my O2 sensor or something else? I've changed the fuel filter but no help.

SOURCE: Starting problem

Try the idle air control valve it is located near the throttle body it has a four wire plug and has two small hoses attached to it this is a small stepper motor that controls the amount of air on start up this part will cost about $200 from a popular auto parts store.

SOURCE: 1997 nissan altima cranks over but dont start sometimes once a we

that could be your starter

SOURCE: 1993 altima will crank but will not start..

replace the distributor oil is leaking into the electronics of the distributor and shorting out pull cap back off and look and see if oil is leaking out

SOURCE: Engine dies for no apparent reason after several hours running

Sonds like a sensor putting out an error code to shut it down ( like a fatal error code) Prolonged vibrations and heat can make cam sensors, maf, o2 senosr do craz ythings which will actuate a govener and stall your car...could also be you fuel pump causually telling you that "hey im bout to die".I dealership can run a stress test (if you will) to check the longivity of the pump...
Good luck hope this helps :)

Dar

• 2007 Answers
• Posted on Jun 30, 2009

SOURCE: 03 Altima 2.5, Wont turn over on cold start

First, change the fuel filter, and make sure the lines are good. Check the intake manifold bolts for tighness, check all vacuum lines. Best to have it running, wiggle them around and listen for a hiss. Lastly, change idle control sensor, if the other suggestions don't make a difference.