The various chemicals emitted in exhaust gasses from an internal combustion engine. The usual gasses which are measured through emissions testing are Nitrogen Oxide (NO2), Carbon Monoxide (CO2), and HydroCarbons (HC).
Questions tagged [emissions]
153 questions
3
votes
1 answer
Car loses power while driving very briefly and on hills?
At this point I am positive it has something to do with the exhaust system but I am hoping to narrow down whether its a bad sensor or a gasket issue. I will replace them all but kind of enjoying the testing to get a pinpoint answer, that is the…
Magic Lasso
- 131
- 2
3
votes
1 answer
Replacement Interval for Carbon or Charcoal Canister
How often should the Carbon or Charcoal Canister for most vehicles be replaced?
Shawn Eary
- 133
- 3
2
votes
1 answer
2005 PT Cruiser Emissions Light On Periodically
The emissions light comes on and while driving, it starts to jerk as if driving a standard transmission and not using the clutch properly. Take my foot of the gas pedal & it will stop for a few minutes - then I can accelerate no problem. Also, I…
caroline
- 21
- 1
1
vote
1 answer
Car fails emissions due to not being driven
My mother is elderly and does not drive very much. Her vehicle registration requires an emissions test. When she went to get the test, she was told that the test could not be performed because the car had not been driven enough. She then took it…
Michael
- 273
- 1
- 3
- 10
1
vote
1 answer
Where does California publish vehicle emission standards?
When a vehicle is smog tested in California, several components of its exhaust gas are measured. If the levels of those exhaust gas components are within limits (presumably established by California), the vehicle will pass (barring any other…
mbmast
- 131
- 3
1
vote
2 answers
Converting emissions readings between ppm and g/km
Having taken my wife's 20 year old Nissan in for it's MOT test last week, I was looking at the results of the emissions test, and noticed that the Hydrocarbon reading was 6ppm - with a limit of 200. I was wondering how that compares to the more…
Nick C
- 28,682
- 7
- 54
- 109
1
vote
1 answer
How can I estimate CO2 emissions for a vehicle travel distance
How can I properly estimate CO2 emissions for a given travel distance (of a private vehicle)?
I found the following formula, but I'm not sure that it's correct:
kgCO2 = Average fuel consumption per 100 km * kgCO2 per liter of fuel * travel distance…
Divin
- 19
- 1
0
votes
2 answers
What is CO2 g/km emissions equivalent of Euro 4 petrol standard?
I am trying to find what Euro 4 standard is with regards to CO2 g/km.
All I can find is that it is:
CO: 1.0g/km
THC: 0.10g/km
NOx: 0.08g/km
This makes no sense to me when trying to compare this to e.g. a CO2 g/km on sites like Autotrader where…
Asu
- 103
- 3
0
votes
1 answer
Why are there differences in 2 Smog Check VIRs?
I had 2 Smog Check Vehicle Inspection Reports within a week performed at different stations. I see differences in both the "Inspection Reason" and the "Software Version/EIS Number" plus the "Exhaust" description is "Single" on both reports but the…
lifewithamac
- 1
- 2
0
votes
1 answer
Why did my smog check cost so much?
I have a 1991 Cadillac Eldorado and had to go to a Star Certified test station for a DMV-required biennial smog check. The technician gave me the price up front and I said that was a lot. He said the cost was $25.00 more than the regular price…
lifewithamac
- 1
- 2