Oil on spark plugs when they were change?

have mechanic run compression test. might need rings or valve job

To replace the valve cover gasket shouldn't be that expensive. Although those cars are known for blown head gaskets, so I would have them look carefully at the back of the engine for an oil leak. If it is leaking oil out of the head, it is only a matter of time before the head gasket will be pushing anti-freeze. Please rate my answer so I get points for it.

A lean fuel mixture will not yield poor fuel economy but a misfiring cylinder will.You have already replaced the coils and the plug leads to the cylinders in question so they should not be an issue.Do the codes still indicate a misfire on cyls. 2 & 3? If so have you looked at the plugs? Has the oil leak around the plugs been stopped? Are they oil fouled? Could the pooling oil around the plugs be shorting the spark discharge to ground?or Valve Cover gasket is leaking. That's why you see some motor oil in the sparkplug sleeve (tube). removed the spark plug and My suggestion is to remove the sparkplug in cylinder 2 & 3 or whichever ones that the scanner indicated as "misfiring". Take a look at the sparkplugs and see if there's any oil around it. If you see any traces of oil, that means your gasket is worned out and need to replace.Good Luck in getting your problem fixed. If you need any further help - I'll try to help you the best of my knowledge and skills. You can repost on this

Bluish colored smoke is oil in the combustion chamber. I would recommend having a reputable garage/mechanic run a Compression Test and Leak Down Test on the engine to determine the condition of the Rings & Valves. If it tests out ok, it may be something as simple as Valve Seals needing replaced.
If the Compression/Leak Down tests don't look good, it may need rebuilt (just replacing rings alone would be a band-aid fix) or a valve job.

2006 3.9 has to be a T-Bird or LS

There are no spark plug wires

It has Coil-On-Plug individual coils

Plugs don't fail --they get changed at 60,000 miles
give or take,say every 3 years

The front (2) O2 Sensors get repalced at 100,000
miles. The ones closest to the engine

Clean MAF Sensor at least once a year

I have no idea how you inspect a pcm,if your
at home & have no scanner or PC Based Software

Egr Valves fail early on those & other fords

You could test,not look at,actually put an oscilloscope
on the TPS Sensor

Any oil on a spark plug requires a new valve cover gasket

If a coil was replaced based on a code alone,you may have
replaced a good one,not what needed to be replaced if any

valve cover leaking

The valve cover gasket isn't hard to change. Oil on the plugs indicates a more serious problem. Smoke from the exhaust would be from rings, rich mixture, worn valve guides. It may be that the engine is overfull (that would show on the stick). Oil loss from a leaking gasket would smoke under the hood and leave oil on the engine and the ground.

Hi,
Looks like some engine oil goes into the cylinder and contaminate your spark plug, thus making your plugs miss.
Look where that oil damp spark plug located at cylinder number, in that cylinder the valve seal is to be replace immediately. Valve seal is located on top of the engine that seals the intake/exhaust valve and valve guide, from oil going in the cylinder.
You could ask your mechanic to do the job, it is a bit hard to replace it. the parts needed coat just under $5.
Hope that helps you out!
Thanks for using Fixya!

get your tools out and learn on the job

replace the valve cover gasket and plug well seals.