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failed 200

posted by  Robs245s on  Tue Mar 30 16:17 CST 2004
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last visit: Wed Jun 18 20:00 CST 2014
[RELATED]

Before you think about replacing your cat, check for vacuum leaks, especially at the intake hose and intake manifold. I failed last week for high NOX. Found a hole in the plastic intake and the intake manifold nuts were slightly more than finger tight. Also check the air box thermostat. The one on my 88 245 with 200k was shot and letting in hot air. I did those three things and passed no problem.






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