Problem with Champion One Piece Plugs? - Ford Mustang Forum
 
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post #1 of 8 (permalink) Old 09-23-2012 Thread Starter
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Problem with Champion One Piece Plugs?

On my 2005 Mustang GT I recently replaced my original Motorcraft plugs with 8 new Champion one piece plugs gapped at .045. Got the old plugs out without breaking any apart. About two weeks later I went on the road for a 1600 mile trip, and the problems started.

Issues
- Check Engine light for misfire on cylinder 5 - not sure if its a bad plug or a coil problem.
- Car runs very badly sometimes at low speeds. Rough idle. Light acceleration feels like there is no power.
- Much louder "popping" from the exhaust when you rev up the engine and quickly drop off the throttle. It sounds very rough (not a pleasant sound).

Good news
- Gas mileage on the trip was 24.6 average for over 1600 miles. Most driving was at speed limit plus about 4-5 mph.

Are these Champions any good, or should I go back to the two piece Motorcraft plugs? I can replace the number five Champion plug, which might be bad, or I could just put a new set of Motorcraft in.

Thanks,

Bruce

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post #2 of 8 (permalink) Old 09-23-2012
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NO!

I would say no on the Motorcraft SP. As you know the seperation problems during the removal of them. I run the Brisk 1pc and have 0 issues the Champions I have never read anything that would indicate a problem with the plug. At the cost for just 1 I would swap #5 or check it out or check the COPs to ensure they are seated well. I would add check all connections to ensure nothing was missed.

T Wayne

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post #3 of 8 (permalink) Old 09-23-2012
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Make sure you didnt crack the porcelain. I have a set of 8 that i ran before i went supercharged if you want. Pm me for a good price. All are gapped and work perfect.

D.O.B. 3V/GT500 Kit 463 RWHP/ 465 RWTRQ @ 11.5 PSI on 92oct - Dyno Dynamics Dyno
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post #4 of 8 (permalink) Old 09-24-2012
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I had the same problem with mine when I went to champion. I wound up having to replace two of them, one was visibly cracked on the tip, one looked fine. I just replaced the ones that gave me a misfire code with new champions and they've been ok almost two years now. Next time I change them I'll use the Brisk plugs, I'm not a fan of champion but I'm not putting a two piece back in there either.
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post #5 of 8 (permalink) Old 09-24-2012
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Porcelain

Cracking will cause problems. The Brisk have been great for me but they are not cheap. How much does a Champion plug cost for our cars?

T Wayne
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post #6 of 8 (permalink) Old 09-25-2012 Thread Starter
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I bought my Champion plugs locally, so I paid $16.01/plug, and there is also a $2/plug rebate from Champion. The Champion plugs are also on Amazon for $15.22/plug with free shipping and the same $2 rebate.

Some other differences I found.
- The Champion plug seems to be an old-school plug design. It can be gapped with a standard tool, while the Motorcraft plugs have a closed loop design around the electrode. I think this requires a special gapping tool.
- Factory gap on the Champion was about .044, and I reset it to the recommended .045 I found in a couple of articles. The Motorcraft recommended plug gap is about .054, so its quite a bit wider.

I know the Motorcraft plugs were cheaper at the store, but I don't remember the price.

Bruce
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post #7 of 8 (permalink) Old 09-25-2012
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Not

Well that is not cheap either. I would swap out the 1 plug as prescribed above.

Keep us posted.

T Wayne
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post #8 of 8 (permalink) Old 09-28-2012
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No problems yet, shop reccomended!!!

I had a local shop put the new Champions in, the car runs great! The guy's at K&S automotive said they have never had a problem with his plug, and recomended it for non supercharged/turbo/ nitrus aplications in the Ford 4.6 The car ran very nice! Although we only had 14,000 on the car? (2007 Mustang GT) These guys at K&S auto are pro's, and they did a fantastic job! Thank's John!
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