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| 1997 to 2003 F-150 4.2L, 4.6L, and 5.4L equipped F-150s. |
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#30
Tue, December 22nd, 2009, 12:33 PM
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As you've discovered, there are minor differences in the engines from a performance standpoint and this is where some of the power gains come from as the years progressed. Tuning plays a small part in this as well, but not nearly as much as you'd think. This is why we are still able to achieve reasonable power gains over successive years.
You definitely are better off with the late model engine, even with the little bit of difficulty you're having at this point.
__________________
Bill Cohron - The Mad Doctor   Power Hungry Performance - The ORIGINAL in Ford performance tuning... Since 1997! (678) 890-1110 www.gopowerhungry.com - Home of the Hydra Chip, Minotaur Tuning Software, and the new Orion Reflash System for Navistar! Bring back  Windows™ XP and 7.  Windows™ Vista and Windows™ 8 is a pain in my a$$!  Windows™ 10 is only slightly less annoying!  Windows™ 11 is garbage!  Much to my surprise, I'm actually quite enjoying Linux! 
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