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 is low continuously (Lean), click on each possible causes item for more details. "Fuel supply state", "Injector"

If HO2S is high continuously (Rich), click on each possible causes item for more details. "Air cleaner", "Vacuum leakage", "Catalytic converter"