Fouled plug already?

[cRaZySHO.]

I just changed my plugs and wires this past Sunday. All Motorcraft stuff. My #4 plug **** the bed today. I started my car up to go bring my friend home, and it was a definite missfire. So I did the standard plug spark test. I loosened all my plug wires at the ignition box, and started the car. I pulled each one off(with thick rubber gloves and rubber handled pliers) to see which one made no difference. Then after narrowed down to number #4, I pulled the #4 wire at the plug, and I heard the spark, and the motor was still sputtering.

So my question is, has the plug gone bad this quickly? It can't be the wire because the wire still transmits spark, right?

 

[projectSHO89]

All that work... take another 5 minutes and pull the plug out and check it!

Steve

 

[BlackOnBlackATX]

If youre hearing the spark then presumably your problem lies in the plug. I hate to think that you got a bad one, but I guess its possible when you think about how many get manufactured, at least a few have to be out of spec. Check the gap too, maybe it was off for some reason. Let us know.

 

[SHOZ123]

You did check the gap on the plugs before you installed them right?

 

[jthomas68]

I`ve never heard of a bad plug from the factory.I`d check the gap,as was suggested.If it is fouled,we`ll have to figure out what the problem in that cylinder is.Let us know what you find.