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How is this plug burning?

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Old Jun 6, 2011 | 10:25 PM
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Dakota2005sp's Avatar
Dakota2005sp
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Default How is this plug burning?
See sig for truck info

They are original and pretty worn. I put the Bosch coppers in.

http://img534.imageshack.us/i/imageverj.jpg/

Thanks
 
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Old Jun 6, 2011 | 10:29 PM
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Looks pretty normal. Contact worn down. Nice white ceramic. I would say nothing is wrong, Unless the rest looked completely different, or this happened in very low miles.
 
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Old Jun 6, 2011 | 10:32 PM
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ash building on the ground strap indicates too much fuel injector cleaner is being used.
Does it look like it has glitter sprinkled on it?
 
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Old Jun 6, 2011 | 10:43 PM
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They all look the exactly the same.


Yes a yellowish glitter color kinda like little spots raised up a bit.

Thanks for the fast replies.
 
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Old Jun 6, 2011 | 10:49 PM
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I think most of the crap on the strap is due to how worn down the plug got. I would just check one of the new plugs every 3000 miles (which should be done anyways).
 
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Old Jun 6, 2011 | 10:51 PM
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Do you do a lot of highway/towing and hauling?

Seems your plug is too hot. it should be tan in color and no sparkles. similar to this.
 
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Old Jun 6, 2011 | 10:52 PM
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Ok thanks.

Do you think gas millage will improve a bit since they were so worn and having a big gap?

I gapped the new ones at a tight 40
 
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Old Jun 7, 2011 | 01:11 PM
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I have a question on the plugs guys, at how many miles on the truck should you replace the original plugs?
 
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Old Jun 7, 2011 | 02:39 PM
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Originally Posted by Jetster220
I have a question on the plugs guys, at how many miles on the truck should you replace the original plugs?

Copper plugs usually go at 25-35k. Platinums 50-75k. Iridium 75-100k. Not withstanding any other failures.
 
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Old Jun 7, 2011 | 09:47 PM
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What kind of plugs are in the 3.7L stock?
 
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