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05-07-2014, 06:42 PM | #1 | |
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Can the ECM measure Nox emissions?
Just wondering if the engine management system (ECM) on the 1999 Montana van is capable of reading and adjusting for Nitrous Oxide emissions.
Anyone?
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05-07-2014, 07:17 PM | #2 | |
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Re: Can the ECM measure Nox emissions?
No, it can't measure Nox....what it can do is adjust timing and fuel mixture, adjust egr flow, and control the cooling fan to keep engine cylinder temp down, which reduces Nox formation.....the second O2 sensor detects catalyst efficiency, which determines if the cat is working efficiently....if it is, then it's reducing Nox....but the ECM does not have any sensor that directly measures Nox.......
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1999montana (05-07-2014)
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05-07-2014, 08:10 PM | #3 | ||
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Re: Can the ECM measure Nox emissions?
Quote:
The new test reads the OBD connector and by not finding any codes the test concludes that the vehicle is operating as designed. The old test would trap a vehicle that had worn guides or rings as it measured carbon emissions beyond CO. To my way of thinking, this new test simply rubber stamps a group of vehicles that have no codes, but that may not be within spec for emissions due to worn internals. If I've read through a number of other sites correctly even the O2 sensor can only compensate for so much on the exhaust side.
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06-14-2016, 06:46 AM | #4 | |
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Re: Can the ECM measure Nox emissions?
Latest ECM are able to calculate the NOx emission value from the engine inorder to check complaince with the present EURO or NAS standard
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