0
Could be your catalystic converter messing up.
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
What causes high CO readings in auto emissions test results?
High CO is a rich air/fuel mixture. Nothing else.
What causes co emissions to be high?
Burning of fossil fuels such as coal or oil.
How do you pass emissions with high co?
It depends on what is causing the high Co. It could be anything from dirty engine oil to and O2 censor. You need to find out what it is and fix it.
Will a small hole in your exhaust make your car fail emissions test?
It depends how small it is, but usually yes. The co will go way up.
Why might an '89 Honda Civic fail an emissions test 3 times because of high readings on idling after changing the O2 sensor and catalytic converter?
Depends on which of the readings failed. Was it CO (carbon monoxide), HC (hydrocarbons), NOx (nitrous of oxides), or a combination of them?
How does a burnt exhaust valve affect emissions?
You would get high CO's (unburnt fuel) @ idle and @ high speed, Depending on how bad and how many vales are leaking. It would fail most smog tests. You could do a compression test to see whitch cylinder is low. Hope this helps, Ben Parker, San Jose, Ca.
How do you pass high co emissions 02 accord?
Check for a blowing exhaust this can put your co up. If not you could try putting a fuel threatment into the car and drive it really hard just before you go into the test. If it still fails after that you should go to someone with a diagnostic computer. This will tell if oxygen sensor codes are stored in the car and the data display will show if the cat is working.
What does CO percent mean on emission test?
Its the percentile of the exhaust that is CO (carbon monoxide). The only thing that can make it high is too much fuel. Nothing else. A car with high CO is running "rich" and consuming a lot more gasoline than necessary.
What are the elements in car exhaust?
Most of the carbon released in automobile exhaust is in the form of CO 2 , although some CO and soot (unburned carbon) are produced. The relative amounts of CO and CO 2 indicate how efficiently the car burns the fuel, which in turn indicates how well the engine is tuned. States that monitor auto emissions sample exhaust with a probe that detects CO. The measured CO concentrations are compared with established standards, for example, 1.20% in the state of Minnesota. If the vehicle fails the emissions test, it must be serviced. (American Chemical Society. CourseSmart for Chemistry in Context, 6th Edition. McGraw-Hill/CourseSmart, 05/05/2008. 33). <vbk:PBK0077267389#page(33)>
Have a 1986 300zx nonturbo that is running hot any suggestions as to causes Its failing the Texas emissions test for CO and HO at low idle speed passes at high speed?
Is rad fan coming on? It has 2 temp sensors one for gauge light and one for comp. If one for comp isn't working and telling comp motor is cold it will be dumping extra fuel thru cold start injector I changed the sensor for the computer and it was the problem. Took a while to change it because its in a tight space
Are carbon emissions released to the air when driving a car?
Yes, in the form of CO2 (carbon dioxide), CO (carbon monoxide) and other carbon emissions, including more or less pure carbon.
What emissions gases is converter with in the catalytic converter?
HC hydrocarbons CO carbon monoxide NOx oxides of nitrogen
