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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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#1
Tue, March 10th, 2009, 09:22 PM
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What year truck are we looking at? I'm assuming it's an '04 to '08, so here's what we've got.
The plugs are a pain in the butt and you'll want to let the dealer do it. There aren't any plug wires on your vehicle. It uses a COP, or Coil On Plug setup which means there are eight coils... 1 for each cylinder. It also doesn't hurt to clean the throttle body. This can help eliminate rough idle. Base idle speed on these trucks is usually 625 RPM. In regards to the spark plugs, some folks have recommended Brisk plugs. See this thread: http://dygytalworld.ehost-services13...read.php?t=526 Hope this helps. 
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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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#2
Tue, March 10th, 2009, 09:25 PM
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2006 f150 5.4l. Also when I hooked up my gryphon today it kept stalling out when I would stop. Not everytime but three or four times, what could that be?
Last edited by tnf150; Thu, March 12th, 2009 at 06:04 PM.
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