emissions
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Joined: Jul 2008
Posts: 2
emissions
1992 900, 5 spd non-turbo,failed emissions, HC PPM = 132, CO% = .72, NOx = 1915. new tuneup. air mass, nox sensor, coolant sensor o.k. runs great! Did the seafoam + gas treatment. what's next? also, I can't change the timing. How do I do it? (Moving the dist. does nothing)
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