When to open or close the EGR valve?
Thinking about what EGR valve does, it then follows that the introduction of exhaust gasses into the engine must not occur when the driver demands power from the engine. An oxygen-depleted charge will not produce any power. The EGR valve mus therefore have a control system that dictates when it should be open, closed or indeed, somewhere inbetween.
What to do if you have an EGR fault?
When presented with an EGR valve fault, At M B Jarvie Ltd we offer our customers the repair option of renewing or removing the EGR valve. Modern EGR valves are often buried in the engine bay and renewal can be very expensive (factoring in both parts and labour).
Is the EGR valve in the engine bay?
Modern EGR valves are often buried in the engine bay and renewal can be very expensive (factoring in both parts and labour). The EGR valve operates in a harsh environment and it therefore prone to failure. We therefore offer our customers the option of removing the EGR system from the engine management programme.
How does the EGR system work in a diesel engine?
Almost all modern cars, petrol or diesel, make use of this system to control pollutants within the exhaust. The operating princpal applies to both petrol and diesel engines, however, diesel EGR systems are typically more complex and, as such, are prone to failure or the requirement for cleaning or renewal. What is EGR?
Can a bad EGR valve stall an engine and Preve?
When the EGR valve is clogged or dirty, as they are prone to, it may not function properly causing the engine idle rough, stall at idle speeds, cause the car to get poor fuel mileage, or emit a strong smell of fuel due to excess hydrocarbons which also results in failing emissions tests.
How does the EGR valve in a car work?
My car has 220000 miles. My car has a manual transmission. The EGR valve is designed to allow the flow of exhaust gases into the intake manifold in controlled amounts. When you start the engine, the valve comes alive and waits in a closed position, blocking the flow of exhaust gases.
Why does the fuel management light stay on when the EGR is open?
This means the amount of hydrocarbon gases emitted from the tailpipe increases significantly producing a fuel smell. Your engine management light may stay on once your car detects an issue with the EGR valve. This could be caused when the EGR is either constantly closed or open.
Why does my engine make a knocking noise when the EGR is closed?
Knocking noises from the engine can be caused if the EGR is constantly closed. This is because at low rpm the fuel ignites early when it meets the high temperature. Detonations are also common as a second ignition can occur after the normal ignition.