RABaldwin62
Junior Member
I have a 2007 Ram 1500 with the 3.7L V6. I have a persistent miss on the number 3 cylinder. I have changed the coil and the spark plug (not with new parts just took them from one cylinder and put them on a different one). I have replaced the intake gaskets, the pcv valve, and the valve cover gaskets. The truck throws both a p0300 and a p0303 code. The miss is only detectable at less than 2000 rpm and only when the engine is cold. Anyone have any ideas as what to do next? There is no water in the oil or oil in the water, vehicle is not blowing white, blue, or black smoke. New throttle body, map and air charge sensor. I would think it a valve seat had fallen or a valve was stuck open it would throw the rocker arm, been there and it makes a great deal of noise when that happens.
