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5.4L running lean?

 
Old 02-16-2008, 05:28 PM
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Default 5.4L running lean?

my truck started running funny so i brought it to the deal to have them look at it. i have a K&N intake on it they said its making the truck run lean has anyone heard of this befor?
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Old 02-16-2008, 08:28 PM
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Yes, that is not terribly uncommon. You are getting more air, faster, to the engine so it could cause the lean reading. I am sure someone here will be able to tell you how to help correct that problem.

Welcome and good luck!
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Old 02-16-2008, 11:26 PM
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Wish i knew what year truck. Could prolly help ya more.
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Old 02-17-2008, 02:59 AM
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its an 07 screw with about 22000miles on it
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Old 02-17-2008, 07:30 AM
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Originally Posted by sgtwatson View Post
its an 07 screw with about 22000miles on it
You need to get a tuner. The CAI is messing up the MAF readings and the computer is freaking out. A tuner can re-set the MAF curve so you can run the CAI with no problem. You need to get an X-cal2. They Hyper junk ones will not work.
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