A Interesting Problem...

[Xelix]

Okay... I've thought I've had this problem pegged time after time, and have just put up with it.

its a 95 interpid 3.5 and have alittle more than slight vibration (but not violent shakes) at idle only. I've changed the plugs, wires, new fuel pump (unrelated, it died), new igintion switch (unrelated), and now the Coil pack. No check engine codes come up at all. But a code reader (repair shop) found one from a while back, cylinder misfire.

Okay what am i over looking here... (god damned fuel injection)... EGR or PCV system is my next guess? or may be fuel filter. I'm at a loss... there is no abnormal shakes or vibration during driving at any speed only at idle.

Any ideas are apprecated...

-Xelix

[dbfordtech]

How about an intake leak? Its not uncommon on the 3.5.
Have a shop smoke the engine, that will tell you for sure.

[wizardb]

try using higher octane fuel see if that makes a difference.

[corning_d3]

I've fixed many returnless fuel system dodge's by hooking the car up to my injector cleaning machine..