What happens to the EGR valve after you shut off the engine?
And the process continues for as long as the engine is running. After you shut off the engine, the EGR valve closes and remains in that position. Gasoline and diesel-powered engines on the road today may use one of several different EGR valve configurations.
Are there any problems with the Saturn’s series?
Saturn experimented with making these out of plastic, it was a huge failure. ALL of them failed, if you still own one of these cars and it hasn’t been replaced, it has failed. Symptoms include hard starting, rough idle, temperature gauge not working, awful fuel economy, poor performance, and stumbling, among many other things.
When to get a diagnostic code for an EGR valve?
You’ll get one anyway if the engine ends up detonating, misfiring or running rich; all of these will trigger diagnostic codes. But you should find EGR diagnostic codes along with them if the EGR is the source of the problem. Richard Rowe has been writing professionally since 2007, specializing in automotive topics.
What causes the oil control rings on a Saturn to freeze?
This allows oil in the oil control rings to overheat, and eventually form a hard varnish which freezes the oil control rings in place.
After you shut off the engine, the EGR valve closes and remains in that position. Gasoline and diesel-powered engines on the road today may use one of several different EGR valve configurations.
Where is the vacuum diaphragm on an EGR valve?
The hose connects the top of the valve to the throttle body or carburetor. The valve’s metal disk houses a vacuum diaphragm, spring, and plunger. Later models come equipped with electronic-vacuum EGR valves inside a small block or cylinder.
Where are the EGR Jets in the intake manifold?
A more radical design, implemented in a few models, was the replacement of the valve with EGR jets at the bottom of the intake manifold. Some newer high-efficiency engines, for example those with variable valve timing (VVT), don’t even use an EGR system. If playback doesn’t begin shortly, try restarting your device.