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Old 01-31-2013, 12:38 AM   #132 (permalink)
plasticuser
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Join Date: Jun 2011
Location: Austin, TX
Posts: 74

Annette - '04 Ford F150 FX4

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Is your MAF/MAP sensor before or after your mod? If your warm intake is bypassing that sensor, you could be under-registering the air flow. This could cause a lean condition but not in the way you intended.
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