2001 Nissan Altima ENGINE STALLS

hi, thanx for the donation, I still suspect the idle air control valve, even though you said that the mechanic cleaned it with the throttlebody, but lets look at a couple other possibilities, because I dont believe this is anything major at all. this will also be some preventative measures also. if they haven't cleaned the throttle plate of carbon, I suggest they do so, also take a look at the the gas filter have it replaced anyway, just for good measure, take a look at the air filter and change also.. also I would check fuel pressure too,(fuel pressure regulator) . these are all minor things ,but they will cause you driveability problems, like the ones you've mentioned. have these things taken care of, and lets see how it goes. keep me posted.

hey thanks for the quick reply. Today, the dealership sent my car home because they could not find the problem. They told me I need to take it to a Nissan dealership and do a "TAKING VEHICLE TO THE DEALERSHIP FOR POSSIBLE PCM PROGRAM REFLASH"
What do you recommend? They spend 2 days testing everything and did not fin a problem. I'm a college student and dont have the money to replace every detail of the car. Thanks again!

yeah , i understand, and thats the crappy part about owning a car, so the best thing to do is try to do some of the easier repairs yourself, its very intimidating but it really isnt that hard for some of these repairs, you can get some of the instructions from us, with no problem, a flash may help but before you do that do the things that i recommended, takes very little money. just remember, before doing any repairs, remove the negative battery cable to avoid any unseen dangers. Also browse thru this website when you have time, we have tons and tons of stuff that will help you, and show you, we have videos too. let me know how it goes or if you have any other questions, oh, and if you have a facebook, then check out 2carpros, request a friendship and the guys will start posting some stuff that will always be helpfull to you

Ok I will start by changing the basic parts of the car such as filters, spark plugs, and check the fuel pressure. I was reading the article on Engine Stalling and the Exhaust gases can be a problem. Few weeks ago before the car start giving problems, I hit the bottom of the car on a bump and it was a hard hit. Even though the engine did not stall right after it, this problem is making me think. So I was wondering if there any other methods to test this besides hitting the manifold when the car is cold? I can not lift my car, so is there another way I can check the catalytic converter as well?

Thanks again I really appreciate it a lot. this is the best website I have found, and I of course, have added you guys on facebook.

Visually inspect exhaust system for dents, damage and leaks. Repair or replace as necessary. Exhaust system can be checked using a vacuum or pressure gauge.
If using a vacuum gauge, connect vacuum gauge hose to intake manifold vacuum port. Start engine. Observe vacuum gauge. Open throttle part way and hold steady. If vacuum gauge reading slowly drops after stabilizing, check exhaust system for a restriction.

If using a pressure gauge, remove front oxygen sensor. Connect a 0-5 psi pressure gauge. Run engine at 2500 RPM. If exhaust system backpressure is greater than 2 psi, exhaust system or catalytic converter is plugged. Repair or replace as necessary.

Crank position sensor is a very common failure on altima and will not set a code in most cases
symptoms stalling at low idle , stop and go traffic and at red light