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High HC and CO, where NOx is low, means the mixture is rich. Your problem is at low rpms around 1400-1500, so you can lean it out at the idle mixture screw under the air flow meter. Turn it out counterclockwise several turns should be enough to get you under the limit. You can also in addition use the fuel quality switch to lean the mixture further. The car will run like a dog, but you can set it back later.
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