Re: Pulled an Oil Covered Spark Plug = ?
Could be just the plug itself was defective - or the plug
Not firing for awhile will collect oil on it, and gum from
Try putting a new plug in it, and check or replace the plug
Since the rest of the cylinder is full of that crud, the
new plug may foul out too, maybe even several times until
the cylinder burns itself clean.
The red exhaust manifold is probably from just the unburned
fuel from that cylinder - the fuel passed on through the
cylinder into the exhaust manifold, then got ignited by the
hot gasses from the other cylinders.
A compression check right now will probably not be very
accurate, as all the crud built up inside will raise the
compression a little (it takes up space,) and the rings
probably aren't seated very well anymore because the unburned
fuel washed the oil off the rings, lowering compression.
You may want to check it, but don't condemn the engine just
Get that cylinder firing again for a few miles, then check
compression again. Hopefully you'll be pleasantly surprised
that it's fine.
Even if the compression is 0, that cylinder will still fire
enough to clean itself up so you can get a real reading.
Rebuilders make tons of $$$ due to misdiagnosis, they love
bad plug wires just for that reason.
If you put a new plug in and it starts firing, but then you
hear it foul again, misfiring - try the old tow truck driver's
trick - essentially the same thing as the county fair "spark
Simply pull the plug wire out of the cap about 1/4" and hold
it there a moment, creating an extra gap. You'll hear that
plug start firing again.
Keep doing that until that cylinder can run on it's own.
It takes a few minutes to burn off all the crud.
Let us know how it comes out - on this thread.