Rough idle
My uncle worked at a dodge dealership as a head mechanic for over 30 years and he also found all of the 3.9 liter engines to have the rough idle. The rough idle cannot be explained but it can be made worse by buildup on the engine. I have a 2001 Dakota sport with the 3.9 and mine does it too and one of the first times i drove it it stalled and its not a Manuel transmission. But onc I changed the oil and put Lucas oil additive as well as regular additives to my gas every month or so it has reduced greatly and not stalled since. Hopefully you find this helpful.
SOURCE: rough ideling
I would recommend, at this point, to take the vehicle to someone who could do what we call an "Induction Cleaning". Dodge engines are noted for deposits forming on the sealing faces of the valves, resulting in poor cumbustion. A compression test might also reveal this. Also, some real good fuel injection cleaner in the fuel tank would also be advised.
SOURCE: dadge dAKOTA runs rough at idle
sounds like brake booster is shot Clamp the brake booster rubber vacuum hose and see if that has any affect if it does the booster needs to be replaced.use a g clamp or similar.if you drive to test be aware that you will have to push very hard on the brake pedal to make them work.Also check for an engine vaccum leak
SOURCE: how to replace a PCV valve on my 1997 dodge neon?
Once you have the new PCV valve locate the old one on your engine. It will sit on the middle of one of your valve covers (most likely passenger side) and will have a line that connects to the top of the valve. Simply pull the old one out and put the new one in snapping that line on the new one. Should only take about a minute to do. Hope this helps, let me know if it does.
SOURCE: rough riding dakota
I would think, most likely the shocks are bad. The springs could be weak, but I would think it would sit a bit low. I'd check the stabilizer links. The vibration could be a bad universal joint in the driveshaft. I'd replace the shocks first.
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