hi I have a ram 1500 2004 5.7 hemi 2 door 2 wheel drive automatic trans.once it warms up,idle drops to 500 rpm, and there seems to be a miss at idle warm or cold. I replaced plugs,wires,crank timing sensor and cleaned mass air sensor.problem still there,any ideas ?

 

Is the CEL on or flashing? You should have your truck scaned for codes that might tell you where the misfire is then you can find out what the cause of the misfire is.

 

thx for responding,code came up for #7 coil pack ,changed that along with wires and plugs.as of now no codes but still not running right

 

Have you cleaned the idle control valve?

 

hi not yet but will tmrw.didnt no they could be cleaned ,thought only replaced.thx ill try tmrw

 

sometimes egr valve can negatively affect idle and how its running. Might be a bit of a longshot, but its only 30 bucks or so to replace.