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Engine Management

Efficient Recirculation

CAMBIARE talks about the technology behind Exhaust Gas Recirculation (EGR) valves and key troubleshooting points.  

 

Functioning to recirculate a metered quantity of exhaust gas back into the combustion process, the EGR valve is a critical component in the modern engine management system. By reducing the amount of oxygen entering the chamber, the EGR valve helps reduce the temperature reached during the combustion process and helps to increase engine efficiency. This in turn reduces nitrogen oxides (NOx) in diesel and petrol engines.

COMMON CAUSES OF FAILURE

Due to the role of the EGR valve within the engine management system and the harsh environment it operates in, it is susceptible to failure due to the following causes:

·         Soot, carbon and oil deposit build up

·         Extreme temperatures that leads to valve damage

Symptoms of a faulty EGR valve include:

·         Loss of engine power

·         Engine juddering

·         Car falling into ‘limp mode’

·         Black smoke appearing from exhaust

If an EGR valve is proven faulty, installers should make a point to replace it, rather than to clean the unit. It is also important to clean the pipework leading to the EGR valve to ensure that existing deposits do not transfer onto the new unit.

PRECISE TROUBLESHOOTING

To avoid misdiagnosing an EGR valve as faulty, it is important to check the other components that may cause similar symptoms to surface:

  • Air mass sensor: A faulty air mass sensor may not be measuring the airflow rate correctly
  • Throttle body: A malfunctioning throttle body may result in an insufficient amount of air entering the engine
  • Vacuum pump: A faulty vacuum pump may prevent pneumatic EGR valves to actuate properly

NOTE: When inspecting an EGR valve, installers are advised to wear protective gloves as it can be extremely hot whilst the engine is running.

EGR VALVES WITH COOLER

EGR valves remain as one of the top performing product groups within the Cambiare portfolio. Rising astronomically within this product category are EGR valves with coolers (VE360186 & VE360188). Fitting a large variety of VAG applications, the EGR valves with coolers cover more than 812,000 vehicles in the UK.

Cambiare recognises that trends in the aftermarket are as dynamic as the development of automotive technology. Thus, they continually review and update their part offering to ensure that the aftermarket can get the parts they need, when they need them.

THE CAMBIARE OFFERING

Cambiare’s EGR valve range comprises more than 150 parts that covers over 9 million vehicles across the UK. This credible programme affords quality assured, OE-specified replacement parts at a competitive price point.

Cambiare offers pneumatic and electrical EGR valves covering popular vehicle applications including the Audi A4, Volkswagen Golf and the BMW 3 Series. Cambiare EGR valves are backed by a 2-year/30,000-mile warranty.

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