Monitor current data after engine warming up.

☞ From "feed back" state in the initial time of quick acceleration section to "rich" state in stall test section.

☞ Go to "feed back" state quickly at idle after quick acceleration.

☞ If current data is high(rich) and is not "feed back" state, there is problem in the intake/exhaust system.

☞ If current data is low (lean) and is not "feed back" state, there is problem in the fuel pressure.

This current data is nothing but an example at certain condition. Thus, the real current data could be different from this example.

If HO2S current data is low continously(Lean), click on "Fuel supply state" item for more details.

If HO2S current data is high continuously (Rich) and intake air is decreased and MAFS current data is lowered, click on "PCSV" item for more details.

If HO2S current data is high continuously (Rich) and exhaust gas is too small and MAFS current data is lowered, click on "Catalytic converter" item for more details.

If HO2S current data is high continuously (Rich) excessive exhaust gas and click on "Vacuum leakage" item for more details.