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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
Thu, December 9th, 2010, 08:15 PM
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Gryphon with K&N 77 Series
Hi all,
I am the new guy. I have spent a day or two searching the site for as much information as I can because I am going to be getting a programmer/tune soon (probably a Gryphon). I am currently running completely stock except for a K&N 77 Series CAI. I hear alot about running lean with CAI on this site and I am concerned about the effects on my truck. I like my CAI so I want to get a custom tuned programmer from PHP to off set this...am I on the right track or am I doing something stupid? I wont act like I am extremely knowledgeable about these topics but when I try to read up on them it seems like everyone has a different opinion. Also, I was accelerating hard the other day and heard a pop, almost like a backfire, could this be from running lean? The truck is a 2006 F150 5.4L 3V FX4 Crew. Only mods are Daystar 2" level and K&N 77 Series. 
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#2
Thu, December 9th, 2010, 10:52 PM
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The custom tunes will be a good idea to account for the larger intake.
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#3
Fri, December 10th, 2010, 06:17 PM
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With a CAI installed in conjunction with a slot style MAF=Custom tunes are a must.....
__________________
SENIOR MODERATOR--PTLA God doesn't have a Facebook but he's my friend. God doesn't have a twitter, but I follow him.
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#4
Sat, December 11th, 2010, 02:54 AM
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I recently became concerned. I hit the gas the other day, at around 30mph, and as it accelerated I heard a misfire. I have a 06 F150 SCrew FX4 5.4L 3V with 54K miles. I would not expect a misfire at 54K...am I correct to expect that I am running lean? How bad is this for my truck? (probably a stupid question) This misfire has happened twice...especially since the temp has dropped and the fuel switched to 89 octane winter gas
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#5
Sat, December 11th, 2010, 10:24 AM
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You need to drive like somebody's grandmother if you want to avoid damage. Do you still have the original stock intake? You might want to switch back to that.
Do you have any trouble codes?
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#6
Sat, December 11th, 2010, 12:19 PM
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No trouble codes ever. I do have the stock intake. Honestly, should I just put the stock intake back in and bring it to the shop to hook up to a meter...or should I leave the intake on and quickly order my Gryphon? The last thing I want to do is blow out a cylinder because its running lean
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