Why does my car stall out? 10 points for best answer?

I currently drive a 2003 maxima se automatic and ever since I bought it I've been changing my fluids on time and occasionally I service the car for any damage. Lately, I notice that whenever I go through multiple stop and go traffic lights, my cars will stall out?

Sometimes I have to admit that when I'm on

I currently drive a 2003 maxima se automatic and ever since I bought it I've been changing my fluids on time and occasionally I service the car for any damage. Lately, I notice that whenever I go through multiple stop and go traffic lights, my cars will stall out?

Sometimes I have to admit that when I'm on the highway I like going fast but not too fast where I floor my car. Anyways, another problem I notice is whenever I initially get onto the highway from the ramp my car pushing my car up to 4,000 rpms, I noticed that my car would stall out after I arrive to my eventually arrive and park at my final destination. HOWEVER one thing I want to note(IF THIS MATTERS AND COULD BE THE CAUSE OF THE PROBLEM) is during the first and second gear, I slowly push accelerate on the car((1250-2000 rpms) then after I pass them I push my car a little bit harder (2500-3000) then finally I give it enough gas to get it from 3000 to 4000 rpms because of the fact that my car gets moving at this engine speed. SO my question is would holding my car at 4000 rpms harm my car(even though it's an automatic?) or is it ok. 4000 rpms may seem alot but is it ok to reach that speed as long as I gently and gradually step on the gas?

The last problem o noticed is that my car stalls out when it is started but parked for a long time. For example, whenever I want to keep the Ac on but cold while keeping my car parked, my car would stall out.

What I'm asking is why is my car acting like this?

Best Answer:

No: Clean the throttle body first. If that doesn't help go to the dealer and they will monitor the engine data to see if all of the sensors are in spec. You may have a bad idle air control motor.

Other answer:

No:
10 points? How about $10?
Millie:
My brother'n'law (mechanic) wants to know if your timing is set right on. He thinks it's too slow and that makes it peter out.
Dominic:
No one in these comments has any clue. There isn't enough information in this post to go off of.
.:
The reason your car is having problems is because you abuse it. That's the price you have to pay for your gangsta-baby lifestyle.
Bernd:
Fuel pump issue ?
☺:
airflow in engine not good

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