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2004 - 2008 Ford F150 General discussion on the 2004 - 2008 Ford F150 truck.

No power underload and running lean.

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Old Nov 25, 2013 | 10:33 PM
  #1  
101st-SAPPER's Avatar
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From: BAMA
Default No power underload and running lean.

Just a heads up to folks about the issue i had.
1st I have 2005 f150, king ranch, super-crew with 5.4 stock expect tires with 190,000miles. When going up hills and accelerating hard it would misfire or seem to loss power. After about 1 week of this, a check engine light came on. I Check the code and it showed to be running lean. I read and read and the best thought i had was spark plugs so i had them changed at the dealership and 2 broke off wish total to be 448.98 for everything. After all this i must say wow this truck is back from the dead feels great and mpg has came up also.. Hope this helps someone like this forum always helps me
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Old Nov 27, 2013 | 01:40 AM
  #2  
vegasdezertfab's Avatar
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From: Las Vegas
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Originally Posted by 101st-SAPPER
Just a heads up to folks about the issue i had.
1st I have 2005 f150, king ranch, super-crew with 5.4 stock expect tires with 190,000miles. When going up hills and accelerating hard it would misfire or seem to loss power. After about 1 week of this, a check engine light came on. I Check the code and it showed to be running lean. I read and read and the best thought i had was spark plugs so i had them changed at the dealership and 2 broke off wish total to be 448.98 for everything. After all this i must say wow this truck is back from the dead feels great and mpg has came up also.. Hope this helps someone like this forum always helps me
I had a similar problem. #5 plug was bad and made the coil fail too. Now that it's fixed like you said, brand new truck
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