EGR Removal and Delete
Here at MAX TUNE we have an advanced solution for EGR removal. The valves can become clogged with carbon deposits, causing them to fail or stick, thereby causing error codes and the vehicle not to run correctly. Our software solution to disable the EGR valve is an effective method of improving the efficiency of your engine.
What is EGR?
A widely adopted route to reduce NOx emissions is Exhaust Gas Recirculation (EGR). This involves recirculating a controllable proportion of the engine’s exhaust back into the intake air. A valve is usually used to control the flow of gas, and the valve may be closed completely if required.
How does an EGR work?
The EGR, in theory, works by sending a small part of inactive gas exhaust back into a vehicle’s cylinders, hence ejecting negligible toxins into the environment. This reduces the heat of combustion, yet the same amount of pressure is still applied to this piston while reducing the amount of excess oxygen prior to combustion. A few studies conducted on diesel engines demonstrate that the portion of nitrous oxide gas emissions is definitely reduced through the use of EGR. However, concentrations of smoke density can actually increase. Thus there seem to be pluses and minuses depending on what’s important to you in your specific vehicle.
Usually, an engine recirculates exhaust gas by piping it from the exhaust manifold to the inlet manifold. This design is called external EGR. A control valve (EGR Valve) within the circuit regulates and times the gas flow. Some engines incorporate a camshaft with relatively large overlap during which both the intake valve and the exhaust valve are open, thus trapping exhaust gas within the cylinder by not fully expelling it during the exhaust stroke.
What are the benefits of an EGR Removal and Delete?
Modern engines recirculate some of their exhaust gases back into the engine with the aim of reducing emissions. This is the main benefit of the EGR system. The downside is that exhaust fumes containing carbon deposits are constantly being recirculated through the engine. Over time this causes a build-up of carbon deposits in the intake manifold etc. These deposits sometimes contribute to the failure of the EGR system itself. Replacement EGR valves can be expensive and in the case of high mileage engines, the continual carbon build up can eventually lead to total engine failure. Removal of the EGR system by blanking off the exhaust input and reprogramming of the engine management ECU results in lowered engine temperatures, improved throttle response and economy and also can lengthen engine life by reducing oil contamination and carbon deposits.
Is it legal to remove an EGR?
At present it is not illegal to remove the EGR valve and it does not form part of the MOT test. Whether this might change in the future, no one knows and our best guess that even if it is, then it will not be applied retrospectively.
What are my options?
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 often necessary if the valve is faulty. Alternatively it can be removed, blanked and deleted from the ECU.