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I am new to the RX 7 scene. I have a 1988 s4 fc. I am doing an internal overhaul and trying to do some modernization in it. I am having an issue with it not passing emissions being High in HC and CO but only at idle. Which makes me believe it is most likely a small air leak. I have seen the cheat sheet but I need to see if there is a leak first and then I will move to catalytic converter.
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