Re: Mazda 323F 1997 1.5 16v Z5 eng. code, have cured high emissions fault but reason why please. Archived Message
Posted by vince mosley on September 5, 2007, 9:25 pm, in reply to "Re: Mazda 323F 1997 1.5 16v Z5 eng. code, have cured high emissions fault but reason why please."
The reason the emissions changed is because you altered where the ecu was reading the 3D fuel/ignition map from. There are usually a minimum and maximun voltage for the idle parameters and it would appear that these had been exceeded causing the excessive emissions.
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