OK... i have posted about this topic a couple of times now, i am getting a little annoyed by this problem i am having. SO cold starts, the engine starts up nice and strong no problem, after being warmed up and turned off, the engine starts right back up most of the time it always starts up no problem. every now and then though when i drive the durango say to school, park it, go to class for an hour and try to start the car up i crank it and it starts but stumbles a little the rpms barely go up and it stalls, i then go ahead and crank it again it takes about 3 seconds of cranking and then i press on the pedal a little bit and the car starts up. what could be causing this?

things i have done

replaced battery
cleaned iac
cleaned throttle body
added fuel injector cleaner
new spark plugs
.........................

any help? when i turn the key i hear the fuel pump priming and everything is normal, driving around the car acts normal, it has alot of power no hesitation while driving no unusual noises just sometimes it starts funny and i cannot figure out why!! could it possibly be the crankshaft position sensor or the camshaft poition sensor? but then i would not see why it would only act weird after driving.

thanks,

 

Have to press on the pedal? That makes me think it's too rich (flooding). Bad O2 sensors can cause your engine to run rich. Have you checked the pressure in your fuel lines?
No check engine light?

 

im leaning towards a bad iac valve. no check engine light, and if the o2 sensors were bad i would think the car would run weird and have bad mileage constantly, but i get good mileage. 15 city 18 highway. also this only happens sometimes, usually when the engine has been driven within the last hour or so.

 

Makes since. According to my Auto Zone app, they're about $30. I'd probably go ahead and change it out at that price. Worth a shot.
Make sure you post an update.

 

I would say it's worth a shot.

 

problem solved. i woke up yesterday morning thinking to myself its gotta be the tps sensor. so i replaced it and now everything works fine hah. odd though i replaced it about 40k miles ago :/. oh well! at least every things back to normal

 

Good to hear.
40,000 miles out of a part with a 2 year warranty... sounds like it lasted as long as expected. LOL.