TECH TIP: Using a Five-Gas Analyzer to Diagnose Catalytic Converters

TECH TIP: Using a Five-Gas Analyzer to Diagnose Catalytic Converters

One of the most effective ways to resolve emissions issues is by sampling the exhaust gases with a five-gas analyzer. Levels of the five gases can indicate the root cause of the problem.
One of the most effective ways to resolve emissions issues is by sampling the exhaust gases with a five-gas analyzer. Levels of the five gases can indicate the root cause of the problem:
• High HC emissions indicate unburned fuel.
• High CO levels indicate partially burnt fuel or oil.
• High NOx levels are normally caused by high combustion temperatures and pressures, slightly lean AFR and excessively advanced ignition timing.
• Tailpipe emissions readings low in HC and CO levels with high NOx emissions are typically NOT caused by a defective converter. The low HC and CO readings indicate that the converter is functioning. The root cause of the problem is an engine which is emitting excessively high NOx emissions. These high NOx emissions may reduce the durability and efficiency of the converter.

 
 

You May Also Like

Do Severe Duty Brake Pads Trade Power For Longevity?

Accepting reduced component life for better braking power in severe-duty applications may be a thing of the past.

Akebono says a new friction formula increase life and lower noise, while maintaining stopping power. Here's what that can mean for your fleet.

Accepting reduced component life for better braking power in severe-duty applications may be a thing of the past, according to Akebono. The company said its new severe-duty line offers aftermarket brake pads for fleets that—through the use of new friction formulas compounds—allow the friction materials to maintain stopping power, while reducing wear and noise.

HELLA PAGID Launches Semi-Metallic Brake Pad Line

Global automotive brake systems supplier HELLA PAGID announced the launch of its latest product line of semi-metallic brake pads.

Reading The Brake Pads For Safety And Profit

Worn brake pads can tell you a lot about the entire system and prevent the new pads from suffering the same fate.

ASE Launches EV Safety Testing and Certification Program

New xEV Electrical Safety Awareness Certification is designed for anyone who may encounter xEV in the workplace.

PRT Releases 28 New Complete Struts in North America 

The new items represent nearly 6 Million vehicles in new coverage and come to expand the PRT portfolio in North America.

Other Posts
Following AC System Service, How Much Oil Is Needed?

Learn how to determine the correct amount of oil to add when replacing the compressor in an AC system.

GreenPower to Showcase its EV School Bus Safety at STN Reno

School Transportation News (STN) Expo Reno brings industry participants together.

Topology And Your Scan Tool

Topology influences how you access the modules with your scan tool.

Car properties detailed in "see proof" car image.
Axle Torque Procedures

Guessing the correct torque setting is a bad idea.