SC400 not passing emissions
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SC400 not passing emissions
My brother has a 1993 Sc400, this is the third time it has not passed emissions (Maryland). Originally it was a North Carolina car, and my brother had it pass Maryland emissions a few years ago.
The 1st time it failed, it was the Nitrogen oxide that failed by small amount. My dad and brother changed the spark plugs, but these were pre-set, and not gapped for the SC400, it took it and all the categories jumped up, but it was still the Nitrogen Oxide. They regapped the spark plugs, and my bro still failed, but the Nitrogen Oxide was lower...
What could be the cause of the Nitrogen Oxide Level being higher...
That's for your help,
Forum newbie
The 1st time it failed, it was the Nitrogen oxide that failed by small amount. My dad and brother changed the spark plugs, but these were pre-set, and not gapped for the SC400, it took it and all the categories jumped up, but it was still the Nitrogen Oxide. They regapped the spark plugs, and my bro still failed, but the Nitrogen Oxide was lower...
What could be the cause of the Nitrogen Oxide Level being higher...
That's for your help,
Forum newbie
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Bentley1
SC- 1st Gen (1992-2000)
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01-08-03 03:18 PM