Nox
Help guys 2day I went 2 get my car etested. It failed. The mechanic said my nox were 2 high everything else was fine.Otherwise everything else passed. All he said is that my nox were 2 high. I need some help 2 identify the problem.
Thanx:s::D |
red font makes my eyes bleed
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Hit the search button on top and you will be surprised to see that it helps. There are about 50 threads on failed emissions.
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If you find its the o2 sensor give me a shout i can get you one for a really good price. i pmed you my cell.
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NOX is engine combustion temp. usually cat fucks that reading up.
post your numbers. or did you pay for etest and the guy just told you it failed and never gave you a sheet? Lol. |
Limit is 757, my reading is 2335 for the nox.:mad:
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same ---- happened to my bros car an his head gasket was gone lol.... but it all depends. could be something small, could be something big.
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if u need an o2 sensor give me a shout.
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wow bvan....husslin o2 sensors much? lol.
High Nox levels can be caused by too much air in the exhaust system (too lean) or from a messed up cat or a bunch of other reasons. What were the other readings? |
like zman said, high NOx readings can be result from running too lean, or a fucked up cat...usually with a reading that high, i would suggest getting either a "legit" test (easiest option), or get it properly diagnosed and get the repair cost limit if you like...
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Cat is most certainly part of the problem with a NOx number that high.
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Yeah I change the cat and it still failed. I'm just fed up.:headbang:
Originally Posted by -----------
(Post 263665)
Cat is most certainly part of the problem with a NOx number that high.
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I'd just pay a certified emissions repair place to fix it, they'll know what to do with the tools they have available.
I've seen lots of people change the cats with minimal effects on the emissions test results. I'd check the spark plugs, plug wires, pcv valve, air filter, check and adjust the base timing with a timing light, check the valve adjustment. Also make sure to take the car for a nice long drive to get the cat really hot before going for your etest. Try to get there as close to the time they'll be performing the test as possible, this will help keep your cat nice and hot to make sure its working efficiently. |
Originally Posted by RedSmyles
(Post 263675)
Yeah I change the cat and it still failed. I'm just fed up.:headbang:
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Originally Posted by zman
(Post 263688)
I'd just pay a certified emissions repair place to fix it, they'll know what to do with the tools they have available.
I've seen lots of people change the cats with minimal effects on the emissions test results. I'd check the spark plugs, plug wires, pcv valve, air filter, check and adjust the base timing with a timing light, check the valve adjustment. Also make sure to take the car for a nice long drive to get the cat really hot before going for your etest. Try to get there as close to the time they'll be performing the test as possible, this will help keep your cat nice and hot to make sure its working efficiently. A Honda dealer couldn't figure out why my Accord wouldn't pass at one point. I discovered in the end that it was nothing more than a disconnected sensor. Suffice it to say that I have fairly low expectations of shops these days. I don't doubt the experience of the average mechanic, but you will find very few good troubleshooters. |
Guess what...my o2 sensor wire was cut. Reconnected it and the car passed like it just came from the factory.
Thank 4 all the inputs!:yeah::):s: |
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Originally Posted by RedSmyles
(Post 263966)
Guess what...my o2 sensor wire was cut. Reconnected it and the car passed like it just came from the factory.
Thank 4 all the inputs!:yeah::):s: who would cut the wires for the o2 sensor? why would they do that? did you not notice the check engine light on before you went for an initial test? |
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