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Effects of head temp sensor on emissions?

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Old 04-25-2010, 04:29 PM
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ibkevin
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Default Effects of head temp sensor on emissions?

New sensor, 25 mph NOX is still high..
Old 04-26-2010, 09:14 AM
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Chris White
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Can you tell if it is ‘dithering’ at that speed? NOX means too lean – a bad temp sender would make it go rich.

Low fuel pressure could also cause the high NOX – but the DME should richen up the mixture at less than full throttle settings.
Old 04-27-2010, 12:27 PM
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ibkevin
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Thanks Chris.

I set the FQS to #4 but my NOX went through the roof, even with a new cat. I checked the FQS three times. I have an EGT sensor for the ZT-2, maybe that will tell me something.

Carbon buildup?

Compression (cold/dry) test was #1 135, #2 137, #3 132, #4 137.



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