Disabling the exhaust gas recirculation (EGR) system.

EGR Removal

Car designers, in their quest for more environmentally friendly vehicles, install various devices that reduce the amount of harmful emissions. However, many of these devices eventually stop working correctly and do more harm to the car than they do to protect the environment. One such unit is the exhaust gas recirculation valve. Solving the problems arising from it brings EGR removal in Warsaw - a popular service provided by STS company.

What is an EGR valve

The Exhaust Gas Recirculation (EGR) system connects the intake manifold after the throttle valve to the exhaust tract with a special channel. At idle and at low engine speeds, it allows returning part of the exhaust gases that have left the engine back into the combustion chamber. This is done to burn the remaining fuel that flies out with the exhaust at inefficient engine modes.

A special valve regulates the return of gases and their supply to the cylinders. At low revs, its flap is open; as the engine speed increases, it closes. EGR valves are mainly installed on diesel vehicles and come in three main types:

1. Pneumatic. The valve opens due to a change in vacuum in the intake manifold. It was installed on older car models.
2. Pneumoelectric. Structurally similar to the previous one, but regulated by the engine control unit.
3. Electric. Equipped with its own servo drive. The time and force of opening are regulated by the electronic control unit.

The design of the unit differs noticeably depending on the model and year of manufacture of the car. The EGR valve can be made either as a rather large unit, similar to a throttle valve, or be a small part, about the size of an idle speed regulator.

Why car owners remove EGR

Like most units designed to increase the environmental class of a car (for example, a soot filter or swirl flaps), the exhaust gas recirculation valve is designed to work in ideal situations. Difficult operating conditions, poor fuel quality, and other non-standard factors lead to its rapid failure.

But even a properly functioning EGR system negatively affects the engine's operation in some aspects:

• Warm exhaust gases, returning to the engine, dilute the air cooled by the intercooler in the intake manifold, and effectively waste the work of this unit;
• Exhaust gases contain not only unburned fuel but also oil residues, soot, and other substances that significantly worsen the purity of the air entering the cylinders, and hence the quality of the mixture;

In addition, the contaminants contained in the exhaust gases settle on the walls of the intake system, reducing the diameter of the manifold, and therefore the volume of air that can enter the combustion chamber. In fact, these deposits cause the valve flap to fail. It sticks in one position, stops responding to control commands.

If the valve gets stuck in the open position, gases continue to enter the cylinders even at high revs. This not only negatively affects dynamics and fuel consumption but also leads to rapid clogging of the soot filter. Blocking in the closed position is somewhat better, but then an error lights up because the control unit sees that the gas recirculation system is not working in normal mode. As a result, the car may go into emergency mode.

Signs of malfunction of the gas recirculation system

You can understand that the EGR valve has failed by the following symptoms:

• Jerks are felt during acceleration;
• The car jerks at idle;
• A decrease in engine power is felt;
• Fuel consumption increases;
• Exhaust gases become more toxic, with an unpleasant smell;
• Black smoke appears;
• The Check engine light comes on on the dashboard.

All this indicates that it's time to solve the problem with the valve. And the best solution is to remove it.

EGR removal, plugging, deactivation - what it means and how we do it

First, before carrying out the procedure, we conduct a full computer diagnostics of the car to confirm the state of the EGR system, as well as other engine units.

Blocking the recirculation valve consists of two parts: physical disconnection and reprogramming. Mechanically, it is often enough to disconnect the connector, fixing the unit in the closed position. In some cases, the EGR valve is removed and a plug is installed in its place.

In order to prevent errors and incorrect operation of the electronic engine control unit and related units, along with the mechanical removal of the gas recirculation system, it is necessary to disable it at the software level. Parameters are changed so that the ECU ignores the constant presence of the valve in the open position and does not go into service mode.

Advantages of EGR removal in Warsaw at STS.Parts

We have qualified specialists with many years of experience in servicing cars of all modifications. We carry out the entire complex of work on disconnecting the gas recirculation system within one working day, including diagnostics of the car before and after the procedure.

After removing the valve, we provide two weeks as a test period during which the client can assess the advantages of the absence of the system. After that, there is a lifetime warranty on the software.

Vehicles we service

We work with all diesel vehicles without exception equipped with exhaust gas recirculation valves - passenger, commercial, heavy-duty, as well as agricultural and special equipment. And although the price for EGR removal in Warsaw depends on the class and specific model of the vehicle, it is much lower than the cost of a new valve. Most importantly, it solves the problem once and for all.