Alrighty, I'm new here, so just a little run down of my situation. . .

I picked up a 1991 Dakota 2.5, with 156,000 miles on it last week. I ran it for about 700 before the problem started.

Now when ever my truck runs for more than a few minutes and I give it more than a 'touch' of gas it will not accelerate and if I push it to the floor it will die. When I turn it off and then on it will stop and allow me to accelerate normally for a minute or two.

I noticed some oil in the coolant today, but no coolant in the oil.

If anyone has any ideas please throw them out! I need help.

http://www.youtube.com/watch?v=350DXut-GHk

 

It could be as simple as a bad throttle position sensor or idle air control valve. But i have also seen blown head gaskets that allow oil in the water but no water in the oil. It could also be a cracked block. First make sure there are no check engine codes. If there are no codes the you probably need to do a compression test and/or leak down test to find out if there is a blown head gasket or cracked block/head problem.