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Old 11-08-2012, 12:28 PM
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2004 Expy plug change

I changed my plugs today with Motorcraft plugs. 4.6L one piece plug is a much easier chore than the older 5.4's.

I really could have waited as I have 92K on the clock and the plugs looked amazingly awesome. No misfiring or any symptoms, i just figured that I would be proactive.

Next time I'll examine the first one that I remove and make a decision whether or not to continue.
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Old 11-08-2012, 03:23 PM
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Originally Posted by tseekins View Post
Next time I'll examine the first one that I remove and make a decision whether or not to continue.
There is no guarantee that the next 7 will look the same as the first one. You will have to remove and inspect all of them if you want to be sure.

A couple of months back I had a misfire in my Mustang. I figured I'd start with the plugs since they were about 4 years old. Every plug looked perfect until I got to the 8th one. It had carbon build-up on it to the point of having bridged the gap between the electrodes. With the 8 new plugs installed the misfire was gone. Now if I had stopped after the first one because it looked good, I would've wasted a lot of time trying to track down the problem elsewhere. The moral is assume nothing and double check everything.
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Old 11-10-2012, 06:59 PM
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The 2004 expys did not have the two piece plug, that came with the 3valves for 2005.
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Old 11-10-2012, 09:53 PM
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The 2004 expys did not have the two piece plug, that came with the 3valves for 2005.
Yeah, I know. It was more of a celebratory statement.
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