What happens if you turn off EGR valve?
What happens if you turn off EGR valve?
If the EGR valve is clogged or completely blocked off it can longer re-burn harmful emissions in the combustion chamber. The NOx emissions will flow unregulated through the combustion chamber and out of the exhaust pipe. The excessive NOx emissions will show up during a smog test and cause a failure.
What happens when the EGR valve gets stuck on a GM 4.3L?
This tutorial addresses a very common problem I’ve seen on the 1987-1995 GM 4.3L, 5.0L, and 5.7L engines with throttle body fuel injection system: a stuck open EGR valve. And when the EGR valve gets stuck open, it’ll cause a rough idle condition that may hard to diagnose.
Can you clean an EGR valve without removing it?
If you cannot get direct access to the turbo an alternative would be to spray (less effective) into the air duct in the direction of the turbo but please remember to remove the MAF (mass airflow)/air intake sensor first as the cleaner may damage it. Please feel free to Comment, Like, Share and Subscribe. This video is for guide purposes only.
Why is the EGR valve so important in a car?
Our latest post gets to grips with why the EGR valve is so important as well as covering the most common symptoms of a faulty EGR valve. For combustion to occur in your car, it is necessary to draw in air (which is approximately 80% nitrogen and 20% oxygen) from outside of the vehicle.
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.
What happens if you remove the EGR valve?
In some states, removing it will cause you to fail your emissions inspection. Unfortunately, there is a huge misunderstanding about it’s function circulating around the internet and sadly a lot of folks have actually removed it in the search for “free power.”
Where can I buy a Delco EGR valve?
Won’t pass the state mandated emission test. You can find the EGR valve in any auto parts store. If you’re wanting the buy the original AC Delco (Delphi) EGR valve, you can buy it online for a whole lot cheaper than somewhere local. The following links will help you comparison shop for the AC Delco and after market EGR valves:
What is the other side of the EGR vacuum solenoid?
The other side of the EGR vacuum solenoid has 2 ports. One is a vent port (that vents vacuum to the atmosphere) when the engine is idling. The other port connects to the EGR valve and should only have vacuum when the PCM commands the solenoid to activate.
Where is the vent port on an EGR?
In case you’re wondering, the letter J is embossed above the vacuum port on the throttle body. The other side of the EGR vacuum solenoid has 2 ports. One is a vent port (that vents vacuum to the atmosphere) when the engine is idling.
