computer says "System Too Lean"
What would be the first things to check?
I'm thinking fuel filter?
I'm thinking fuel filter?
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2001 Chevy Impala (3400) -
Fuel Filter, Fuel Pressure, fuel pump, then injectors...
Got Lope?
3500 Build, Comp XFI Cam 218/230 .050 dur .570/.568 lift 113LSA
Fully Balanced, Ported, 3 Angle Valve Job, 65mm TCE TB, S&S Headers.
Stage-1 Raybestos/Alto 4t60e-HD, EP LSD, 3.69FDR
12.61@105 Epping NH Oct 2015 Nitrous 100shot (melted plugs) 13.58@98.8 N/A 3200LBS -
Thanks for the reply. I will start with the filter.
Is it bad for the engine to run a bit lean?2001 Chevy Impala (3400)Comment
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How old is your O2 sensor?Ben
60DegreeV6.com
WOT-Tech.comComment
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too old.2001 Chevy Impala (3400)Comment
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That could be the reason it says you are lean. It doesn't know whats going on.Ben
60DegreeV6.com
WOT-Tech.comComment
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Originally posted by SappySE107 View Post
Old sensors are unreliable (rated for what, 50-60k?). Get it changed, reset the code and run it a couple days and check it again.-60v6's 2nd Jon M.
91 Black Lumina Z34-5 speed
92 Black Lumina Z34 5 speed (getting there, slowly... follow the progress here)
94 Red Ford Ranger 2WD-5 speed
Originally posted by Jay Leno
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Most likely vacuum leak. too much air getting into the system unaccounted for. Had this code the other day and one of the tubes coming out of the intake were unplugged.Comment
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