When my truck is cold it runs ok. Not the best but ok. Once it starts to warm up, lets say a mile down the road, it will barely idle and dies when in gear. The truck is old and has 180,000 miles on it and uses a quart of oil every couple of thousand miles. I started by replacing the plugs, wires, distributor cap, roter, fuel, and fuel pump. Once warm, the truck does not seam to act like its not getting fuel. It blows black smoke and spits and sputters but does not backfire. Once it starts doing this it becomes extremely hard to start, or it’ll fire and then die right away, almost like it’s not getting spark. I have tired dumping fuel into the intake and it did not help it start.
I attached some you tub videos first of truck cold and then with it warmed up.

Cold at start up
http://www.youtube.com/watch?v=IaGUaJgHE3E

Warm
http://www.youtube.com/watch?v=GSZhKeZ8HK0

1993 Dodge Dakota
V-8 318ci
Auto
4x4
Extended Cab

 

I Just put a new coil on and started it up. Seems to run fine but its still cold. I will let it idle and see if anything changes

After Coil
http://www.youtube.com/watch?v=AVrt3a8-0Gw

 

I hope you got it. A bad coil can cause you problems.
If not there are Tons of possibilities. Did you check your engine codes? Check the FAQ if you don't know how to. The O2 and Coolant Temp. sensors can cause those problems too.

 

I left it idling and I heard the rpms increase and checked on it and they were back up to the 950 mark. The truck started running poorly again. I dies when put in gear, have to hold it to the floor to get it to start, barely can get it to idle.

Thanks Crazy for some ideas. I'll check out the FAQ for code reading.



http://www.youtube.com/watch?v=jolOAtcjoLM

 

could be a sensor or something! It also could have jumped time too. I had a Trans am and the timing was off and it didnt want to crank after it warmed up, but it didnt run bad after it did crank.