2000 Ford Ranger stalling and idling rough

Without a code, it becomes a guessing game. Since the problem is when it is cold, I have to question the temp sender. If it doesn't recognize that it is cold, it may not be running the fuel mixture rich enough.

When it is cold, does it have a miss or anything? Have you checked fuel pump pressure when it is cold?

Yes, it could. Have you checked it?

Hi:
My god, no. You said nothing wrong. I have just been swamped. Sorry for the delay. Can you tell me how many miles are on the vehicle? It says 65 on the post.

Okay. I was thinking there could be a compression issue. Have you checked that?

Everything we reviewed seems normal. This is a tough one. I am going to discuss it with another tech and get their input to see if we can come up with more ideas.

This has been handed to me to help. F'rom your first description I would think along the line of a vacuum leak because when it warms up the computer is richening the mix enough to take it over so it won't run rough. Or maybe a dirty egr valve/plugged passage. This could also be a broken grommet on valve cover or something similar to that or a hole int eh maf to throttle body duct work. It can be as little as a small hole in vacuum line or cracked line. Try plugging the two lines I've pointed out one at a time while cold and see if that helps if it does then the line will have to checked for a small hole/crack.

Looks like the bottom but you could unplug both and see if it makes a difference as well then you know it would bean ever or cco problem.