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4.6 swap fuel tuner help

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  1. 4.6L Tech
    I just swapped a 2002 4.6l 2v sohc into my 98 gt. For the most part everything went pretty smooth except it didn't pass emissions. The test showed that cylinders 1 and 5 were miss firing and that the motor is running lean. I figure the old 98 ecu is reading the new motor wrong so i'm thinking...
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