Sometimes
a cloud of smoke
Yes, the EGR valve, or port EGR
yea you should change it
hopw do I find the egr valve on a vauxhall signum
Would this cause the car not to start If the EGR VALVE is bad
When the EGR valve goes bad, it circulates very rich mixture back through the intake. You most likely have fouled spark plugs.
A bad EGR valve in a 2000 Saturn can have several symptoms. The EGR valve can cause misfires, the valve can cause vacuum leak style problems. There could also be an engine knock.
Just replace it, the sensor on the top of it is usually what goes bad.
No, the catalytic converter is downstream from the EGR valve so it has no effect on it.
yes
It does not happen as often as you might think. But it does happen. Usually EGR valve goes out if you car is 10 years and older and you have way over 100K miles. Also if the valve is cleaned regularly it will work longer.
Start the engine, and spray a little carb cleaner around and on the EGR valve. If the engine changes sound are idles up are down then the valve is bad.