Spark Plugs Changed. Done!
Thread Starter
Senior Member
Joined: Jun 2010
Posts: 132
Likes: 10
From: Houston, Texas
Spark Plugs Changed. Done!
About a week ago I got my spark plugs changed at 107000 miles on 2006 5.4 liter. I took my truck to a local dealer and they gave me a good deal on the work. I replaced the motorcrap plugs with the Champion 7989s. So far the truck runs great. Who has these plugs in their truck and how is it running?
Senior Member
Joined: Jul 2009
Posts: 291
Likes: 4
From: Minneapolis
Champions
Had mine done a few months ago (no other changes at that time). Working great for me. Even have a small improvement in mpg since the change, something I hadn't expected but much appreciated.
Member
Joined: Dec 2009
Posts: 90
Likes: 4
From: Tampa, FL
I installed those Champion plugs in my truck back in February of 2010. In February of this year I started having misfires. I took the truck to a local mechanic who determined it was a bad coil and changed it out. Within a few days my CEL came on again and it was showing a misfire again on the same cylinder. I took it to another mechanic who checked out just about everything they could without tearing it apart and said they couldn't find anything wrong with it. I mentioned to them that I had put the Champion plugs in it about a year ago, it was a little over 10,000 miles at that point in time, and they said I should replace them with the Motorcraft plugs. They said that until I did that they wouldn't be able to do anything else with it because they needed to eliminate the plugs as a potential source of the problem. Well, they wanted too much to replace them so I took it home and replaced the plugs myself with the Motorcrafts and lo and behold the misfire went away. Prior to replacing my plugs the first time I had read many posts about the Champion plugs causing misfires after about a year or so of use but I decided to give them a try anyway because I wanted the one piece plugs. Well, it obviously didn't work out well for me either. So anyway, hopefully you guy's will have better luck with the Champions than I did. If you do start having misfires down the road though, I would definitely look at the plugs as the source of the misfire before you go replacing coils or anything else. Live and learn I always say. 