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International Automotive Technicians Network
Re: Causes for Low HC High CO
Posted to Technical Discussion Forum on 2/6/2017 1 Reply

Most of us would like to know year, make, and model. Engine size too. But with the little information you have given here so far, I would make sure the fuel trims and O2 sensors do not change too much under all engine load conditions.

With the engine and ca... Login to read more.

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