clearing oil gallery - how?

I read that sometimes the oil gallery where te oil sensor unit is screwed into can sometimes be clogged and affect psi readings. I would like to try to clear it unplugging the coil wire and give it a few cranks with the sensor removed. Novice question.... Can someone tell me where the coil wire is that I should unplug? Looking at the engine I must be blind but I can't figure out where it is.

There is a spark plug wire that is in the middle of the cap, follow it, it goes to the coil.
Unplug either end an crank away

souske said:

There is a spark plug wire that is in the middle of the cap, follow it, it goes to the coil.
Unplug either end an crank away

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Maybe,since no year was specified!

yep.. It's a 2000 4.0 with what I believe they call a coil rail. On this type of design is there a coil wire I can unplug to crank and not start the engine?

Remove the oil pressure sender, then the 90* brass elbow from the block. Clean out the elbow and the sender. You can do a visual inspection of the threaded hole in the block to see if it's clogged. I doubt it is.