I have a 96 3.9 Dakota that runs ruff at low rpms. (Stuffers and spudders) I am wondering if anyone has a clue why? It has a fresh tune up (plugs wires cap) idk what else I just bought the truck 2 weeks ago. It has a studder/ spudders until the 1200/ 1300 rpm range. Any In site would be appriciated thanks in advanced. P.s I know it needs 02 sensors would that cause it?

 

ROUGH deal.
It STUTTERS and SPUTTERS.
Hmmm.... dirty fuel delivery system maybe.

 

Check the timing? Possible loose or poorly connected plug wire. Dirty injectors, vacuum leak? For air leaks a cheap test is to spray carb or TB cleaner over the vacuum partswhile it is running. If the idle changes when you do it there is a leak in that area. It is not specific but it is easy )

 

I had it running last night for about 20 minutes or longer and it only acts up when it's been running for a period of time. I checked my codes and the only codes that came up where for bad o2 sensors. Could they be the problem? Something about faulty and high voltage in the o2s. I know I need both my upstream and downstream replaced. There is only one of each.