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1992 Toyota Camry failed smog test for high CO. 3.0 liter engine.

What do I have to do to pass CA smog test? My test result are the following: Passed everything except high CO at 25 RPM. Max Co: 0.60 Ave CO: 0.07 Meas CO: 0.80 What does this mean and how can I get my Toyota Camry to pass the smog inspection? Thank you for your help.
Answer:

So your 1992 Toyota Camry failed for high CO. Basically your Toyota Camry is running "rich". Too much fuel is entering the engine. CO stands for Carbon Monoxide. It is a by-product of incomplete combustion. If your Toyota does have a "rich fuel" problem the diagnosis should begin with inspecting all possible mechanical faults which could cause too much fuel to enter the combustion chambers. You need to make sure your Toyota Camry doesn't have high fuel pressure, air restrictions and/or leaking fuel injectors. Something as simple as a dirty air filter may restrict ample air from entering the engine. The lack of air will create a rich fuel condition and result in high CO. Although we do have to note CO in excess of .20 is usually related to something other then a dirty are filter. One of the first electronic emissions components to inspect should be the oxygen sensor and the fuel injection "feedback" system. You need to make your Toyota Camry's oxygen sensor is working properly, the emission computer or engine control computer is receiving the signals from the oxygen sensor, the computer is computing the data properly and sending the correct signals to the fuel injectors to either increase or decrease fuel delivery to the engine. At the end of the feedback test it will be know whether the high CO fault is electronic or mechanical, and the technician can further diagnose the fault. Unless you have the proper tools to diagnose smog check or emissions problems, and the knowledge, we recommend having a certified smog check repair station conduct a hands on diagnosis to find out why your Toyota Camry produced high CO and didn't pass the smog test. posted by SmogTips Support

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