Emission Control Systems

Air Injection System (AIS) – Air Pump – Function, Types, Failure

09/08/2025

The air injection system (AIS), is actually part of the car’s exhaust system. Since no internal combustion engine is 100% efficient, there will always be some unburned fuel in the exhaust. As a result, the […]

Emission Control Systems – What Are They – How Do They Work

06/04/2025

Emission control systems help control fuel fumes, while cleaning engine producing exhaust gases. So, emission control systems, have been efficient in reducing air pollution, caused by automotive engines. And, emission control systems, depend on a […]

(O2) Oxygen Sensor: Function – Failure Symptoms – With Testing

03/10/2025

The, (O2) Oxygen Sensor, measures the difference, between the amount of (O2) in the exhaust gas. And, the amount of (O2) in air. So, with that information and other sources, the (ECU) can decide, whether […]

PCV Valve System: This Is Where Crankcase Gases Get Recycled

08/27/2024

So, the PCV valve system, is one of the oldest and most used emission control devices, in today’s engines. And, although its name might sound very complicated, it is a very simple device. The PCV Valve […]

PCV Valve: How Does It Work, Failure Signs, How To Test It

08/26/2024

Knowing how the PCV valve actually works, is the first step in diagnosing a bad or failing one. When your engine is running, thousands of powerful explosions take place, to release the fuel energy. But, […]

Positive Crankcase Ventilation (PCV) System: What Does It Do

08/25/2024

First of all, the (PCV) System is the short form or common name, for the Positive Crankcase Ventilation (PCV) System. So, the Positive Crankcase Ventilation (PCV) system, is basically a one way passage. And, is […]

(PCV) Valve: Major Problems From Lack Of Regular Maintenance

08/23/2024

Replacing a (PCV) valve, isn’t difficult. But, sometimes accessing it can be a struggle, depending on your vehicle. So, most people don’t realize how important regular maintenance is, on your (PCV) system. And, then only […]

(PCV) System: One Of The Biggest Causes, Of Engine Oil Sludge

08/22/2024

Did you know the most common problem, in the (PCV) system, is a plugged up (PCV) valve. Another problem, is a lack of air flow, to carry vapors, away from the crankcase. Because, without air […]

Exhaust Gas Recirculation: Types, Failure, Cleaning, Replacement

08/21/2024

The exhaust gas recirculation (EGR) valve, does exactly what the name implies. It circulates, exhaust gas, for a second time. So, exhaust gas recirculation (EGR) valves, do not normally require maintenance. But, they can become […]

(EGR) Valve: Common Problems And Troubleshooting Procedures

08/20/2024

The (EGR) valve system, is designed to help minimize, harmful oxides of nitrogen in the air we breath. To help do this, the (EGR) valve allows, a calibrated amount of exhaust gas, to reenter the […]

Loose Gas Cap: Most Common Cause For A Check Engine Light

08/14/2024

So, a loose gas cap is among the many causes, for a (CEL) check engine light to come on. In fact, a loose gas cap, is actually the most common cause, of a (CEL) check […]

Oxygen Sensor (O2) Mounted on Exhaust Manifold

Oxygen Sensor (O2) – Rich Or Lean Engine Codes, What To Check

07/15/2024

Replacement of a good Oxygen Sensor, is a common mistake made by (DIY) mechanics all the time. So, before replacing any Oxygen Sensor, you must find the real problem first. First, the Oxygen Sensor is […]

(O2) Oxygen Sensors – Function, Failure Symptoms, And Testing

03/22/2024

EVERY VEHICLE BUILT SINCE THE EARLY 1980’s, HAS ONE OR MORE (O2) OXYGEN SENSORS INTEGRATED INTO THE EXHAUST SYSTEM. So, (O2) oxygen sensors, confirm, that the proper air/fuel ratio, is actually reaching the engine. Consequently, […]

(EVAP) Evaporative Emission System – Function – Failure – Testing

02/11/2024

The function of the (EVAP) evaporative emission system, is to trap and store evaporative fuel emissions. Therefore, the (EVAP) evaporative emission system totally eliminates fuel vapors, as a source of air pollution. However, sealing the […]

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