When I passed the smog emission test it wasn’t so good, so I’m trying to adjust it by myself.
First test with the lambda probe disconnect (mine is from 1999)
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On the other hand, when the micro-switch is on, the value exceed 60% (don’t know why yet)
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After a few adjustment, seems fine to me
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For now, impossible to unscrew the old lambda probe. Once it will be replaced by the new one, I’ll be able to see with an air/ratio meter where I am exactly.