How to read the HC ppm emissions test?
How to Read the HC PPM Emissions Test. Most states in the U.S. require that vehicles undergo emissions or smog testing. These tests measure the amount of pollutants vehicles expel into the air and identify those vehicles that need to be fixed before they can be driven again.
What do you need to know about the emissions test?
Onboard Diagnostics (OBD) Emissions Inspection An OBD emissions inspection essentially checks that the vehicle is running to its own standards by tapping into its computer system.
Where do I find the hydrocarbons in my Emissions test?
Within the tailpipe section of your test results you’ll see “HC PPM,” which refers to the hydrocarbon amounts. Locate the tailpipe section of your emissions test results. Find “HC PPM” within the tailpipe section.
What’s involved in an exhaust gas inspection?
Incomplete monitors usually just require the vehicle to be driven more, but failed monitors will need to be diagnosed, repaired, and retested. The OBD test can cover basic emissions, but the exhaust gas analysis inspection is more precise. Using an exhaust gas analyzer in the tailpipe, emissions are measured and compared.
How to Read the HC PPM Emissions Test. Most states in the U.S. require that vehicles undergo emissions or smog testing. These tests measure the amount of pollutants vehicles expel into the air and identify those vehicles that need to be fixed before they can be driven again.
What do you need to know about an emissions test?
Most states in the U.S. require that vehicles undergo emissions or smog testing. These tests measure the amount of pollutants vehicles expel into the air and identify those vehicles that need to be fixed before they can be driven again.
Within the tailpipe section of your test results you’ll see “HC PPM,” which refers to the hydrocarbon amounts. Locate the tailpipe section of your emissions test results. Find “HC PPM” within the tailpipe section.
What do you need to know about a smog check?
A smog check has 3 sections: A Visual Inspection; A Functional Inspection and an Emission Measurement Test. At the completion of the smog check, pass or fail the smog shop is required to provide you with a report of your vehicles test results. This article will focus on how to interpret the results of your smog check.
How to check NoX sensor reading without urea injection?
NO x concentration comparison in the first test without urea injection. … Temperature, flow rate, and O 2 concentration in the first test without urea injection. … NO x sensor reading and ammonia sensor reading in the second test with a high urea injection. … Content may be subject to copyright. Content may be subject to copyright.
How is NoX sensor reading correction in diesel engines?
In this paper, we investigate NOx sensor reading correction in diesel engine selective catalytic reduction (SCR) system applications. It is well known that the urea-based SCR system is promising to remove engine-out NOx emissions and achieve strict legislative emission regulations.
When to diagnose an emissions test failure?
However, armed with a test report indicating what gases are high can help you determine what systems may not be functional. If the vehicle has failed as a result of high CO and HC, the CO failure should be diagnosed first. If the “Service Engine Soon” or “Check Engine” light is on it should be diagnosed prior to any emissions diagnosis.
What to do if your car fails the NOx test?
If you own a non-EGR equipped vehicle, and have failed the emissions test for high NOx, pay close attention to the Catalytic Converter. Read about Catalytic Converter
What causes high No ( Nox ) in the air?
What Causes High NO (NOx)? Nitrogen Oxide or NO is created when an engine’s combustion chamber temperature reaches over 2500F. Vehicle manufacturers have designed several systems, which when working properly, lower nitric oxide emissions.
What can be done about high NOx in smog?
The solution to this problem is called De-Carbonizing. It usually costs around two labor hours at a smog check repair station. It will remove a good amount of carbon out of an engine. This will increase combustion space, lower compression and lower NOx. 5. Engine Overheating – Inadequate engine cooling can will high NOx.
When does NOx occur in the combustion chamber?
As mentioned above NOx is created when combustion chamber temperatures reach above 2500F. By recirculating exhaust gas back into the intake, a small amount of the air/fuel mixture is replaced with inert gas, reducing combustion temperatures.