Fault Codes for '02 VW Passat

passat
engines
volkswagen
valves
noises

#1

In a previous post (http://act…48399.page) had noted my initial symptoms that my V6 Passat has sounding like a diesel - although it is not! The sound is definitely under the hood - possibly the engine. It’s a steady sound that’s gotten progressively worse! I had the VAG-COM connected at Joe’s VW shop in Dedham, MA (GREAT GUY!) and the faults I got were:



16684 - Random/Multiple Cylinder Misfire Detected

P0300 - 35-10 - - - Intermittent



16688 - Cylinder 4 Misfire Detected

P0304 - 35-10 - - - Intermittent



16687 - Cylinder 3 Misfire Detected

P0303 - 35-10 - - - Intermittent



16690 - Cylinder 6 Misfire Detected

P0306 - 35-10 - - - Intermittent



16891 - Idle Control System RPM Higher than Expected.

P0507 - 35-10 - - - Intermittent



Any thoughts or ideas what this could mean!?!


#2

What was the last thing that was done to the car before the misfires started?
Did you have a tune up done?

Since the codes aren’t from a common bank of cylinders, the first thing I would do would be to pull off the ignition coil sticks and spark plugs, take a look at their condition, then snap everything back together tightly, and see if the misfire issue vanishes.

If it does persist, then I would swap those three coil sticks with the other three cylinders, and see if the problems follow the coil sticks, or stay put. That would then lead to further choices.

BC.