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Exhaust Gas Recirculation, a term commonly abbreviated as EGR, is a technique that manufacturers use for reducing NOx emissions in their environment. This technique entails the diversion of a controllable amount of engine exhausts into the air. Each end of this valve can either be partially or entirely closed. Substituting burnt gases with oxygen concentrated air can reduce the number of cylinders that is available for combustion. Typically, an engine recirculates un-useful gases by transferring them from the exhaust manifold to the inlet manifold. This pattern of gas transmission is referred to as external EGR. The EGR Valve within the circuit monitors and regulates the gas flow in the engine.

Such exchange also minimises the rate at which the cylinder conduct heat and can further affect NOx emissions. The presence of inert gas in the cylinder can lessen the speed at which the cylinder holds heat.

In a typical automotive spark-ignited (SI) engine, 5% to 15% of the exhaust gas is routed back to the intake as EGR. The maximum quantity is limited by the need of the mixture to sustain a continuous flame front during the combustion event; excessive EGR in poorly set up applications can cause misfires and partial burns. EGR causes measurably slow combustion. The impact of EGR on engine efficiency largely depends on the specific engine design, and sometimes leads to a compromise between efficiency and emissions

EGR is typically not employed at high loads because it would reduce peak power output. This is because it reduces the intake charge density. EGR is also omitted at idle (low-speed, zero load) because it would cause unstable combustion, resulting in rough idle.

Since the EGR system recirculates a portion of exhaust gases, over time the valve can become clogged with carbon deposits that prevent it from operating properly. Clogged EGR valves can sometimes be cleaned, but replacement is necessary if the valve is faulty.

Though the replacement of the EGR system might be expensive, it’s always advisable to change it on time. If the EGR system is not replaced at the right time, the continuous carbon build-up can eventually cause complete engine failure.

Excessive carbon deposited on valves causes blockages and further reduces engine performance, this can lead to engine codes and limp mode.

With Our EGR Software Removal, we can program the valve to constantly stay open


  • More Power
  • Better Fuel Efficiency
  • Improved Throttle Response
  • Less Flat Spots
  • Cleaner Intake System and Engine
  • Reduced Maintenance Costs
  • Prolonged Engine and Turbo Life