My engine stalls at idle?

I have a 2000 ford explorer, when I come to a stop the car will shake a small bit and then die. I have replaced the Mass Air flow senor, throttle position sensor, trasmission (with a rebuilt one cause it was bad) had the vaccum lines gone through and timing checked to make sure they were all correct, any advice would be a great help Thanks

The check engine light is on and the code shows it is the IAC sensor but when the ohms are checked on the sensor it shows 10.8 which the manual is in the varience

I cleaned it with electrical cleaner

It was the plunger I cleaned but I went to clean it again it looked pretty clean could the ohms be good and the plunger b wore out.

I did not notice any scratchs and the plunger did move but felt like it had some drag

I went to the parts store bought a new IAC installed it and it still dies

Car will not run when it is cold, then runs fine later. Just won't idle up and run whn it is cold, once it starts runs fine- just had 2 o2 sensors put in, then 2 days later check engine lite came back on. Someone told me I needed a fuel pump- any suggestions

Dont believe it is same code, they told me my fuel pressure is running low and that the fuel pump would be the only answer. Would the temp sensor be on the codes? I know he told me it showed a misfire. And no I always have drove into the shop and then they scan, I need to leave overnight I guess and let them scan?

How do I know for sure it is the fuel pump- they cost over $300 just for the part, I really don't have the money to be throwing around if it is just a chance it is that, w hat would you start with

I have Ford Explorer 2000 with 104000 miles on it. The problems just start about 3 weeks ago: When I start the car, the engine start OK with the RPM needle went to 1.5 and it drop down to to 0.5 and pull back to 1. Some time the RPM needle went to 0.5 then pull it down to 0 which caused the engine to stop (I can heard the sound of the engine drop before it shut down). When the RPM needle drop down to 0.5 or the engine almost shut down and if I apply the gas padle then the egine will go back to normal and the car stay run OK. I did replaced with a battery but the engine still shut down. Could you please help me to identify the problems? Thanks

Fixed the problem: Idle Air Control valve (IAC) need to be clean. After the cleaning, the engine running great. Here is the link to the cleaning procedure with the image of IAC valve.

Good luck to all

2000 Ford Explorer Two Wheel Drive Automatic

My car will only start when I am pushing on the gas. Once started it will only stay running when my foot is on the gas. The first time this happened it was cold -0 degrees. I started it and warmed it up for 30 minutes. It stayed running. This time it is 25 degrees.
Our repair shop has said the tranmission is having problems - no overdrive.
Are these related or what else could be causing this problem.