Misfire/Oil In Spark Plug Well

[deermagnet]

The odd bank is on the passenger side.


The even bank is on the drivers side.


Mark Griffin

[100kVX]

Thanks for all the help.

I got the cylinder numbers from a previous post, but Griffin's numbering seems to be correct.

The oil in what I thought was the #4 well was actually the #3 well, but the misfire was in what is truly the #4 well (driver's side middle well). That still leaves me to wonder why there was oil in the #3 well. I'll inspect that one periodically to see if the oil returns.

After inspecting the wires as Griffin suggested, I found that the connection to the #6 coil was loose; causing the new codes. After securing it, codes P0356 and P0300 went away, leaving me with the original P0304 code. I traded the #4 and #2 coils as suggested by Ldub in the above reply and the code moved with the coil. Code P0304 went away and P0302 replaced it. This leads me to believe the ignition coil is bad. I'll try replacing it and will make a new post once I do. The coils are a bit pricey at $138.45 each as quoted by Merlin.

[psychos2]

I have not had a valve cover off but would think that there is an o-ring or gasket were the valve cover and the head meet. If the o-ring or gasket is bad you will get oil leaking into that area. shawn

[johnnyapollo]

The dip-stick is right below #3 - could there have been a bad seal forcing oil up the tube, to dump in that position? Just a thought.

-- John

[Jolly Roger VX'er]

It wouldn't hurt to make sure your PCV is still "rattling" to indicate it is probably functioning okay. If it doesn't rattle when you remove it and shake it, that could cause crankcase pressure to build and oil will probably leak from where ever the pressure can escape. I only throw this out because I had a "brand spank'in new PCV" fail on me after I installed it for the trip to Moab . Started spraying oil out of my breather cap (aftermarket) and I sucked down a 1/2 quart of oil rather quickly before discovering the problem. (Normally she doesn't use hardly any oil in 3,000mile change intervals.)

The downside is that even if crankcase pressure caused a leaking gasket; the damage has been done to the gasket or seal and it will probably need replaced even if you restore the pressure to its proper level (functioning PCV).

[100kVX]

The new ignition coil did the trick. No more misfiring. I'll check the spark plug well in a few weeks to see if the oil has returned. I'm also going to check into the PCV. Thanks for all of the tips.