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Technican: There is a Tech Service Bulletin talking about this specific problem. I have a F150 that did the same thing. Problem is in the intake manifold gasket. The gasket shifted slightly and now you have a small air leak. THis leak causes a "coaking" action to take place and coats your spark plug with carbon. THe carbon acts as an insulator to the spark and the engine starts to run like junk. If you do not know where nr3 cylinder is I do not recommend attempting this repair. It is not difficult but can get tricky. Let me know if you need more info.
Owner: Well That was helpful, an dI understand if you dont think I should repair this.....I wont, However I would like to verify which one is # 3 so I can change the spark plug. I am quite familiar with spark plugs and the like however I want to be sure. I believe the #3 is: If you are in front of the explorer with your head under the hood it would be the one on the left toward the front. Then I believe the only way to get at it is to remove the wheel well.... ot do you have a better idea? Rather than do the repair I want to just change the plug....... So I would be happy for your to 1) verify the that this is cylinder #3 and let me know how to best get at it. I would be happy with this service. Thanks again.
Technican: Normally you do not have to remove the rubber from inside the wheel well to remove a spark plug but at times that is the most direct method. Ford has changed the numbering sequence a few times over the years but I think for your engine the front plug on the passenger side is Nr1 and and they number sequentially back to the fire wall.. You will know if you have the bad plug.. it will be covered with a grey or brown layer of hard stuff (coaking)...Let me know if this helps. Here's How To Get Guaranteed Solutions In Minutes
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