HELP: need advice on CEL code
 

The code was 0171 or P0171 - System Too Lean (Bank 1).

What does this mean? and what should I do?

BTW I do have the Injen CIA and custom 2.25" exhuast(cat back)

I have 2000 LX 1.6L Auto.

Thanks in advance

hows your fuel filter? Have you ever changed it? It might also be your inj. need to be cleaned..just a few sugg.

I am sure the fuel filter is ok.

as for the injectors, should I just use an additive like redline or something ?

whats a good additive to use?

The work shop manual lists the following as possible causes:
-Misfire
-HO2S (front) deterioration
-HO2S (front) heater malfunction
-PRC solonoid valve malfucntion
-Pressure regulator malfunction
-Fuel pump malfunction
-Fuel filter clogged or restricted
-Fuel leakage on fuel line from fuel delivery pipe and fuel pump
-Fuel return hose clogged
-Leakage from exhaust system
-Purge solonoid valve malfunction
-Purge solonoid hoses improper connection
-Innsufficient compression

Then, under the "Diagnostic Procedure", step 8 is to check MAF signal and step 9 is to inspect for excessive air suction of intake-air system.

I would take a gander and say to check you intake installation and make sure your connections are tight and your MAF is installed correctly. It could be causeing the MIL indicator to light up from not being recalibrated to your intake yet.

ok more info for ya.

I did the bicycle tube gasket/seal on the maf.
and it seems to do it more often when it is hot out.

lately it has been in the 90's here.

I will test with a spray bottle and see if I have any leaks.

and how often should I clean the filter on the Injen ??