04 5.4 CAI lean conditions - Power Hungry Performance Forum

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04 5.4 CAI lean conditions

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2004 to 2008 F-150 and Mark-LT
4.2L, 4.6L and 5.4L equipped F-150s and Mark-LTs.

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Wed, February 15th, 2012, 06:23 PM

88Racing 88Racing is offline

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If you don't have any vacuum leaks and have changed out the maf the next two suspect are the forward o2 sensors and exhaust manifold leakage before the o2 sensors...

Also when's the last time the spark plugs were done?

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