my dodge shakes like its missing at idle. Some days its good some days its bad. I dont use coolant and come nowhere near overheating but the upper radiator hose gets really hard when hot. I dont smell exhaust or oil in my coolant and I cant seem to see coolant in my oil.. it's usually black when I let it cool. It doesn't smell like its burning coolant either.. I rerouted wires, and replaced them.. I replaced cap, plugs, and rotor 70k ago.. I was told they cant make it do this. Any suggestions?

 

Plugs are a replacement item every 30K miles...... do those first.

 

Replaced plugs, cap, and rotor. Still shakes

 

Now it only shakes when its cold.. when it warms up its fine :/

 

What plugs did you put in? How's your plenum?

 

Plenum was fixed, im using champion copper heads. For some odd reason, its been driving perfect for the past few days.. but it shakes if I fill my gas tank to the top and if I drive crazy.. if I unplug my PCM and go for a ling drive it stops again

 

I am not a fan of champion plugs. In fact, I REALLY dislike them....... my recommendation would be to try swapping them out for some autolites, or similar quality plugs......

Does it start doing it immediately? Or only after it has been running for a few minutes?

 

I was told to run champions.. I've tried three other plugs and it still does it.. I'm out of state today, and it stopped dong it until I topped my ank off with premium.. now its shaking again. Only seems to shake and run like crap when I fill my tank completely to the top. It will occasionally throw a P0303 code.

 

Swap the injectors on 1 and 3, see if the miss moves with the injector.

 

Swapped it and the miss is still p0303. Pressure test on all cylinders is good