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How do I bring my NOx grams per a mile down? (Massachusetts inspection sticker)!!! PLEASE HELP! 700

posted by  Steve on  Thu Jul 22 12:22 CST 2004
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last visit: Fri Oct 24 07:16 CST 2014
[RELATED]

Start with the 700/900 FAQ ("features" button above) for tips. High NOX is a result of high combustion temps due to:
-vacuum leak in the intake system (lean mixture)
-EGR faults
-timing off

Start with vacuum leaks: make absolutely certain you do not have a leaking air intake hose, vacuum hoses, or intake manifold gasket. Clean the EGR if so equipped. If you've got a B234 GLE, then you know that timing/balance belt changes are incredibly important.






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