Thread: truck running lean now
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Old Fri, March 20th, 2009, 11:21 PM
jerzpilot jerzpilot is offline
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Default truck running lean now
My CEL came on today after installing a JLT CAI and the gryphon a couple days ago, I changed the muffler today. the code is P0171 and P0174 which it says is running lean. Help please.