rough accelleration, but runs smooth at any speed held

Asked by Dec 16, 2014 at 09:27 PM about the 2003 Dodge Ram 1500 SLT Quad Cab SB

Question type: Maintenance & Repair

2003 1500 2WD, quadcab Shortbed, 4.7L V8.  Original Owner, it sat in Driveway 2009 while I was in Iraq, but otherwise is my prime vehicle.
at 150K miles new fuel pump - I had a shop replace this, it went out on a full tank too
at 160K miles new fan on AC heat exchanger - I did this myself
at 170K miles needed new ball joints - I had a shop do this
at 195K front hub bearings went I popped these out and replaced myself
at 198K brake line failed while parked at work, fluid drained out into parking lot  
today, at 201K it is running OK, but shutters accellerating, idles OK, hold constant speed OK, but at any speed, from 10 to 70mph it shutters if I accellerate 'mildly' have full power when I punched it briefly into passing gear, but shutters afterward trying to gently accel.
got home and used key to call up P-codes in Dash and got a P-0304
to be honest last 50K, it has been using oil, do not see drips on the pavement, but need to add oil between changes

1 Answer

210,185

P0304 is a misfire on Cylinder #4. Time to replace the plug, I'd do all of them. See if that helps, if not then replace the coil on that cylinder.

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