I have a 98 Dodge Ram 1500 that runs great when it's cold, but as soon as the engine warms up, it loses power and sputters. Changed oil, filter, plugs and wires, and air filter...didn't make a difference.

Any suggestions would be a great help.

Thanks

 

Try disconnecting the pre-cat O2 sensor. If it drives fine that way, (aside from the CEL) replace the sensor.

 

Thanks I'll try that tomorrow.

 

Have you changed your distributor cap?