Why is the EGR valve open all the time?
They are supposed to only be open in certain circumstances and are controlled by the engine management system. If they clog, they can stay open all the time which leads to poor engine performance. There are several options available to you when it comes to the EGR valve. You can replace the valve with a new one.
Where is the EGR valve on a Trafic 1.9?
To find the EGR valve on the 1.9, first you need to remove the plastic engine cover that rests over the top of the engine (if yours is still attached that is), you then need to look on the top of the engine, to the right of the airfilter box. The valve has a plug going into it, which is the solenoid control wire.
How does the EGR valve work on a 1984 Corvette?
The 1984-1996 EGR valve works like this: the EGR valve’s pintle should rise when applying vacuum with a hand operated pump. 1984 EGR valve operation can be felt with your fingers as vacuum is applied. We use a mirror to check the 1985-1991 EGR valves’ operation.
How did exhaust gas recirculation ( EGR ) come about?
Exhaust Gas Recirculation (EGR) came about in 1975 when catalytic converters were introduced. The inert exhaust gas was used to quell the increased heat in the engine’s cylinders from the lean fuel mixtures required to keep the catalytic converters from melting down.
What happens when you have a bad EGR valve?
The engine will have a rough idle when the EGR valve is faulty because it will remain in an open or closed position. This implies that too few or too many exhaust gases are entering the chamber, and this is why the engine is idling.
How to clean a blockage in an EGR battery?
You will need to clean the EGR valve of the blockage using the following steps: 1 Disconnect battery 2 Remove sensors or clips 3 Loosen bolts holding the EGR valve 4 Use a EGR or Carburetor Cleaner to spray the valve and hoses 5 Reconnect the battery
How often should you check your EGR system?
When it’s failing, the exhaust pipe will discharge more pollutants than the approved level. Most countries require a vehicle’s emission test every six months. Check the EGR system if your car fails the test. You already know that all problems occur due to two reasons – the EGR valve stuck open or it stuck closed.
How does the EGR system work in a car?
The EGR system reduces the combustion temperatures in the cylinder, which results in lower emissions and discharging fewer oxides of nitrogen (a pollutant). The working mechanism involves creating a diluted air-fuel mixture by allowing a metered amount of exhaust gas into the engine.