Failed aircare (Emissions) Questions?? Confused??
02-11-2012, 10:56 PM
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Join Date: Nov 2001
Location: vancouver, BC, Canada
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Failed aircare (Emissions) Questions?? Confused??
1992 Camaro Z28 5.7L (rebuilt as of 1 1/2 years ago), brand new injectors, brand new igition, wires, distributor and cap, as well as plugs.
Car was tuned up by the dealer 3 months ago) and getting the best gas miliege i've ever received on my car.
I normally drive WITHOUT cats (Comes factory with 2 cats with airtubes). Today I went to muffler shop and had BRAND NEW High Flow (3" reduced to 2 1/2 installed with flanges) as I only want to pass emmisions and then will pop back the straight pipe after passing.
The muffler shop only installed 1 of the airtubes to the cat and left the other cat's airtube unconnected (the line from the car was taken off due to it rattling against the frame of the car when the straight tubes were there and the tubes were just hanging there.
They claim the car only needs the 1 airtube hooked up.
[EMMISIONS TEST]
Drive 30 mins to aircare facility. Car was not turned off and the engine temp was showing around 60-70degress (Assume Farenghiet due being in Canada?).
I was SHOCKED to see that I failed?? With all new stuff, how would I fail??? But I only failed Hyrocarbons and by 0.05!
[FAILED stats]
HydroCarbons (Max Allowable: 0.5000) FAILED at 0.5501
Carbon Monoxide (Max Allowable: 9.3200) PASSED at 4.6974
Oxides of Nitrogen (Max Allowable: 1.2400) PASSED at 1.0977
[PASSED: 2010]
HydroCarbons (Max Allowable: 0.5000) PASSED at 0.3287
Carbon Monoxide (Max Allowable: 9.3200) PASSED at 2.2016
Oxides of Nitrogen (Max Allowable: 1.2400) PASSED at 0.8603
Now my questions are these because you'll notice that in 2010 my stats were MUCH lower (car was running lean, needed tuneup and cats) than with the rebuilt engine, new parts, brand new cats.
1. Does the readings look like I need to just change the O2 sensor?
2. Obviously nothing to do with cats, HOWEVER what about the fact that only 1 airtube was hooked up, would THAT be a cause of this failure?
3. Or could it simply be the cats were hot enough and can just fork out the $23 for a retest and it was likely just the cats needed to be warmed up more?
Car was tuned up by the dealer 3 months ago) and getting the best gas miliege i've ever received on my car.
I normally drive WITHOUT cats (Comes factory with 2 cats with airtubes). Today I went to muffler shop and had BRAND NEW High Flow (3" reduced to 2 1/2 installed with flanges) as I only want to pass emmisions and then will pop back the straight pipe after passing.
The muffler shop only installed 1 of the airtubes to the cat and left the other cat's airtube unconnected (the line from the car was taken off due to it rattling against the frame of the car when the straight tubes were there and the tubes were just hanging there.
They claim the car only needs the 1 airtube hooked up.
[EMMISIONS TEST]
Drive 30 mins to aircare facility. Car was not turned off and the engine temp was showing around 60-70degress (Assume Farenghiet due being in Canada?).
I was SHOCKED to see that I failed?? With all new stuff, how would I fail??? But I only failed Hyrocarbons and by 0.05!
[FAILED stats]
HydroCarbons (Max Allowable: 0.5000) FAILED at 0.5501
Carbon Monoxide (Max Allowable: 9.3200) PASSED at 4.6974
Oxides of Nitrogen (Max Allowable: 1.2400) PASSED at 1.0977
[PASSED: 2010]
HydroCarbons (Max Allowable: 0.5000) PASSED at 0.3287
Carbon Monoxide (Max Allowable: 9.3200) PASSED at 2.2016
Oxides of Nitrogen (Max Allowable: 1.2400) PASSED at 0.8603
Now my questions are these because you'll notice that in 2010 my stats were MUCH lower (car was running lean, needed tuneup and cats) than with the rebuilt engine, new parts, brand new cats.
1. Does the readings look like I need to just change the O2 sensor?
2. Obviously nothing to do with cats, HOWEVER what about the fact that only 1 airtube was hooked up, would THAT be a cause of this failure?
3. Or could it simply be the cats were hot enough and can just fork out the $23 for a retest and it was likely just the cats needed to be warmed up more?
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