Are there any problems with the emissions system?
Also, excessive carbon build up can lead to problems as well, and require extensive cleaning of the passages for the gases. Those are just some of the things we have to deal with when checking the emission control system on your vehicle. There are many different functions to be performed, and all of which need to work together.
Why did my car fail the emission test?
What is CO. My vehicle failed the emission test for high Carbon Monoxides. Why my car produced high CO. High CO failures explained. How can I lower CO. Common high CO failures. Common CO faults. Failed high CO. Failed high Carbon Monoxide.
Which is the number one overlooked emissions component?
1. Dirty Air Filter – The number one overlooked emissions component, yes, “emissions” component is the engine air filter. A dirty air filter will absolutely restrict air flow, thus disturbing the proper 14.7:1 air/fuel ratio required for optimum fuel combustion.
What causes a high HC reading on an emissions test?
Let’s start by understanding what things cause a high HC reading. A high HC reading means the test found high HC (hydrocarbons) in your emissions. In other words, too much gas is left in the exhaust after combustion.
How many trucks failed the emissions test in 2005?
Of the 314 vehicles inspected, 219 trucks failed the test and required repairs. A majority (92%) of these vehicles were equipped with engines of model years of 1990 and older. Some of the results are summarized in the first column of Table 2 (labeled “2005 ARB Data”).
What was the emissions limit for a Chevy truck in 1979?
For 1979 through the current day, the dividing line between light and heavy duty emissions was raised from 6,000 lbs GVWR to 8,500 lbs GVWR, forcing more trucks to comply with the stricter emissions standards than previously.
What are the emission standards for a 1973 GMC pickup?
For 1973 to 1978 all passenger cars and light trucks under 6,000 lbs GVWR must meet stringent light duty emission standards. All trucks heavier than 6,000 lbs GVWR must comply with heavy duty emission standards, which are much more lenient.
What is the effect of engine service on emissions?
In engines with EGR or NOx aftertreatment, engine wear may also lead to increased NOx emissions. A number of studies investigated the effect of engine service on emissions. Engine emissions can be affected—sometimes significantly—as the engine deteriorates due to normal wear and/or lack of proper service.