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NOX problem update 200

posted by  yama on  Wed Dec 31 02:59 CST 2003
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last visit: Fri Oct 25 05:26 CST 2013
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Did a little more troubleshooting into my high NOX problem today. Checked both ignition and fuel injection codes for failures. Did have the 2-3-1 fuel system compensating for rich or lean air/fuel mixture with no check engine light igniton had no fail codes. Did the propane test with no change in engine speed. Pulled out back spark plug and noticed some wetness. My guess is unburnt fuel didn't seem like oil. Pulled #2 plug noticed no wetness and maybe a slighly too hot condition.

My theory.

Dirty back injector causing bad spray/rich condition in back cylinder. Oxygen sensor senses rich conditions and compensates by leaning out mixtues cause hot combustion and high NOX reading.

Any opinions?






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New NOX problem update [200]
posted by  yama  on Wed Dec 31 02:59 CST 2003 >


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