This is a 2004 Dakota with a 3.7 V6. While driving with a steady pedal the rpm will oscillaite maybe 200 to 600 rpm. I had a thread a couple days ago and someone suggested it maybe could be the converter not locking up which would effect mph but I feel the rpm is where the problem starts. Or maybe I have two different problems. What is in the system that could control rpm besides the foot pedal?

 

Torque converter clutch locking/unlocking will bump your 200 RPM down or up.... (respectively) On my truck, (full size though....) it was the throttle position sensor was just a bit wonky. Replace the sensor, problem gone.

 

Well HeyYou, your the Man of the Day. Made a dash to the parts store, they shock me down for $35.00, dashed back home and replaced the throttle control sensior and bingo life is good again. Thanks for your reply!!!!!!

 

Excellent. I love the easy ones.