[2000XLTV8]

I have the exact same problem - except that mine doesn't involve the water. My 2000 Explorer acts like this all the time. But, like you said, sometimes it runs just fine and other times it won't even idle without my foot on the gas. I'm looking for some suggestions as to what may fix this problem. I've had 3 different mechanics look at it and hook it up to their computers and tell me they fixed it. The same thing still happens and the check engine light stays on all the time. Please reply if you have figured out how to fix it!!! Thanks.........