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Old 11-18-2009, 01:41 PM   #1
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Spark plug problems

I changed out my spark plugs the other day and they were gapped correctly and tightened down and everything seems to be correctly hooked up and back in place, but my gas mileage since changing them has dropped almost 5 mpg. Any suggestions what this could be? I didn't know if it was possible to just have a bad spark plug, and if so what i could do to figure out which one. Any help is greatly appreciated.
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Old 11-18-2009, 01:43 PM   #2
With sufficient thrust, pigs fly just fine.
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Something isnt right....How many miles? Engine type? Mods?
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Old 11-18-2009, 01:53 PM   #3
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I used the OEM denso plugs. Bought them at the dealership. My truck is an 06 double cab trd. I had gotten about 17-18 mpg, but only ran a half a tank through it this time and noticed that the fuel gauge was going quicker than normal, filled up and got just over 12 mpg. Don't have any mods that should affect it. I guess I may just take them all out again and double check everything.
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Old 11-11-2011, 09:12 AM   #4
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Tacoman,

Did taking it apart and fixing it help? I have the exact problem. After searching the threads this is the only one I could find.

Thanks
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Old 11-11-2011, 09:14 AM   #5
I've done... questionable things.
OZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shed
 
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I had the same problem , but it only occurred for the first tank if gas after the plug change , then went back to normal .
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Old 11-11-2011, 09:18 AM   #6
I support a velociraptor free workplace.
BrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shed
 
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2009 thread revival...
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Old 11-11-2011, 09:19 AM   #7
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great, thanks. Hopefully after the next tank it will return to normal. I will update if it does.

Revived threads sometimes help!
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Old 11-11-2011, 09:20 AM   #8
I support a velociraptor free workplace.
BrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shed
 
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Quote:
Originally Posted by oregonianincalifornia View Post
great, thanks. Hopefully after the next tank it will return to normal. I will update if it does.

Revived threads sometimes help!
My bad, I misread yours about having the same issue
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Old 11-11-2011, 09:23 AM   #9
I've done... questionable things.
OZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shed
 
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Quote:
Originally Posted by BrokenTusk View Post
2009 thread revival...
Gestapo
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Old 11-11-2011, 09:27 AM   #10
I support a velociraptor free workplace.
BrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shedBrokenTusk is one of the sharper tools in the shed
 
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Quote:
Originally Posted by OZ-T View Post
Gestapo
Thats policia to you
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