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1997 to 2003 F-150 4.2L, 4.6L, and 5.4L equipped F-150s. |
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#5
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Might be cheaper to take it to a dealer, or someone who has an IDS to do a Relative Compression Test. They can preform this test without even opening the hood, and it is very accurate.
![]() I am with 88 on this, if the vehicle has been well maintained I would not be the least bit worried about adding custom tunes. Just a thought. |
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