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#1
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Emmision System
I had my car inspected and it didn't pass the emission test. NOx(ppm )
current reading is 2199 (High Speed Emission) Low Speed Emission reading was 2595 . Can you please help, and advise what may be the cause for such high reading? |
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#2
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Um, what's it supposed to be to be within specs?
"jusjac" > wrote in message lkaboutautos.com... >I had my car inspected and it didn't pass the emission test. NOx(ppm ) > current reading is 2199 (High Speed Emission) Low Speed Emission reading > was 2595 . Can you please help, and advise what may be the cause for such > high reading? > |
#3
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Well accroding to the Reading Standard High Speed Emission (25 MPh) is NOx
(ppm) 984 min reads 2199 and Low Speed Emission Resupts (15 Mph ) Standard is 1088 mine reads 2595 |
#4
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jusjac wrote:
> Well accroding to the Reading Standard High Speed Emission (25 MPh) is NOx > (ppm) 984 min reads 2199 > and Low Speed Emission Resupts (15 Mph ) Standard is 1088 mine reads > 2595 > does the car have EGR? that directly effects NOx readings. |
#5
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Sorry , but what is EGR? it's a 91 automatic accord.
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#6
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jusjac wrote: > > Sorry , but what is EGR? it's a 91 automatic accord. Exhaust Gas Recirculation. Some of the exhaust is pulled back into the intake to dilute the air/fuel mixture. This is done for the sole purpose of reducing NOx emissions. Not all cars use EGR, but on cars that do, a faulty EGR valve can cause problems with increased emissions. What trim level (EX, LX, DX etc.) is your car, and what engine does it have? |
#7
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EGR only works at idling, on 1 cylinder.
He has serious high temperature in the combustion chamber, perhaps excessive carbon deposit? Or a faulty Cat? SoCalMike wrote: > jusjac wrote: > does the car have EGR? that directly effects NOx readings. |
#8
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High NO is caused by high combustion temperature, such is resulted from
either advanced timing or carbon buildup in the the combustion chamber. If this is my car, I would run a bottle of combustion cleaner and change the timing to the minimum. If that still not reduce NO enough, then I would look at the catalytic converter. jusjac wrote: > I had my car inspected and it didn't pass the emission test. NOx(ppm ) > current reading is 2199 (High Speed Emission) Low Speed Emission reading > was 2595 . Can you please help, and advise what may be the cause for such > high reading? |
#9
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Thanks for the information , i will try this
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