I just had my 1999 Dodge Dakota 3.9 V6 tuned up (plugs, wires, cap and rotor). The truck runs great until I get it up to about 50 mph. Then it runs rough but levels out at about 60 mph. I'm thinking fuel pump but hoping there may be something less expensive that is causing this? Any ideas?

 

That is strange. I would check the throttle position sensor first, then be sure the tune up was done correctly and they got the right plug wires connected to the distributor cap on the correct towers. You might pull the plugs out and see they are gapped correctly too.

Jimmy

 

Thanks. I will double check to see if the tune up was done right.