I have a 2004 Ford Taurus SOHC.
I went ~6 months with a bad catalytic converter. I just had the cat replaced last week.
About ~2 months ago (while driving w/ a bad cat), I heard a 'knock', and since then, my Taurus does the following:
* Rough Idle
* Jerks around ~40 mph
* 'Knocking' sound near the gas pedal, when I accelerate at reasonable rate
OBD-II codes show:
* P0302 - Cylinder 2 Misfire Detected
* P0316 - Fault definition not available or Manufacturer specific
The body shop (that replaced the cat) recommended "... vehicle is running rough possibly spark plug or fuel system related"
Any ideas as to what is going on here?