Lean codes
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Lean codes 02 firebird formula, LS1.... No problems until I added a K&N cold air aftermarket MAF housing, a superchips cortex tune, SLP exhaust, and bypassed the TB coolant..... Now I'm getting lean codes on both banks... Any help would be much appreciated, I've cleaned the MAF sensor from extra oil from the filter and checked for vacuum leaks none found /:
Okay. I don't see anything on the list of things you changed that would trigger lean codes other than the tune and something wrong with MAF setup. If you think those have been eliminated, that leaves the traditonal causes of lean codes - check the fuel level, the fuel pressure, and/or change the fuel filter.
Last edited by Darkman; Apr 19, 2012 at 09:54 PM.
Lean Code Darkman, thank you for posting that awesome diagnostic procedure, where did you find it? I have been intermittently getting those code in my Yukon. So when I was scrolling through recent posts and saw this one I thought I would check it out, and I am glad that I did. Thanks!
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