A
faulty EGR valve can cause your car to stall in between. Take a look! –by
Partsavatar Automotive Parts.
EGR valves or Exhaust
Gas recirculation valve is an important component of exhaust system that is
responsible for expelling the exhaust emissions from the exhaust tailpipe of car
into the atmosphere.
EGR valves burn the
car’s fuel more efficiently by recirculation and burning a portion of exhaust
through the combustion process again. In other words the spent exhaust gases
are recirculated back into the inlet manifold to be used in the combustion
again.These re circulated exhaust gases cool down the temperature of combustion
as the nitrogen is produced at high temperatures.It not only decreases the
emission but at the same time also prevents the formation of harmful gases.
This technique is employed by all most every
vehicle to control the pollutants in exhaust.A faulty EGR valve could cause
rough idling and poor acceleration along with poor fuel economy of your car. It
is better to judge your requirements- replacement or repair. You can buy and
replace Aftermarket EGR valve of car at budgetary prices also to gain back your car’s
mileage.
Let us take a look at
some symptoms and other necessary information regarding EGR valves. You can
visit Partsavatar
website or can take advice regarding EGR valves by sending
message or whatever method you choose.
Symptoms
of Bad EGR valve
Emissions and
performance of engine is gravely effected if the EGR valve goes bad. There are
various signs to watch out for. Let us have a look.
Loss
of power and acceleration
The very first victim
of a failing EGR valve is engine. The performance of Engine decreases
drastically if the EGR valve fails. You will start to notice sudden loss of
power, acceleration. This is more dangerous if you are in middle of driving and
you notice these symptoms.
Fuel efficiency is also
effected due to bad EGR valve.
Rough
Idle
EGR valves could start
to malfunction and stuck in a position in the case of rough idling. Car will
not run smoothly and you will notice sudden shakes and stalls while driving.
Check
engine light comes on
Check engine light of car is another warning signal that may come
on if the engine is not working properly. Though, check engine light may
illuminate due to several other reasons. But if the EGR valve fails, the
computer detects and sends the signal to check engine light that something is
wrong with the valve.
You can confirm your
suspicion by calling a professional to know the exact reason behind check
engine light.
Testing
an EGR valve
You can also run simple
test to save time and money. There is a simple process to troubleshoot a bad
EGR valve. You will need a vacuum
pump of car for testing, which you can buy at any
online store. There are certain steps to test an EGR valve.
Locate
the EGR valve
Locate your vehicle’s
EGR valve by going through the owner’s manual. It is generally located at the
side of the engine like a round, thick metal disc.You can also search for
particular model EGR valve on the internet or any online store to get the exact
picture of your item. Our major goal is to get to the EGR valve.
Testing
the valve stem
After locating the
valve, our next mission is to open the valve by using vacuum pulls. By
increasing the vacuum pulls on the diaphragm of the valve we can easily access
the inside of the valve.
Try to move the
diaphragm with your fingers. If you are unable to do so by using finger
pressure then there might be carbon deposits that are possibly restricting the
plunger movement in the valve.
Testing
Diaphragm
By time, diaphragm show
signs of aging and can cause leakage of exhaust gases. To inspect the condition
of valve’s diaphragm, you will need to do the following test.
Apply the parking
brake, block the wheels and start the engine.
Carefully spray the auto
carburetor cleaner through the underside openings and
towards the diaphragm. If the engine’s rpm increases when you spray, it
indicated that there is probably a leak in the diaphragm and you need a new EGR
valve.
Testing
stem movement
Start the engine and
let it idle for 15 minutes. Increase the speed of engine to about 2500 rpm by
pressing and releasing the accelerator pedal. Notice the diaphragm movement
while doing so. You can also take assistance.
If the stem or
diaphragm doesn’t move disconnect the thin vacuum hose from the valve. Place
the finger on the vacuum hose opening. Again increase the rpm and feel the
pressure from your finger tip. If you can’t feel the pressure then there might
be something wrong with the circuit that provides vacuum to the valve.
Replacing
and cleaning EGR valve
You are just adding
green house gases in the atmosphere if the EGR has failed. This is because malfunctioning
EGR valve makes passage for harmful emissions in the atmosphere.
It is very easy to
clean the EGR assembly and to replace the system as a DIY project. If still
unsure about your capability, feel free to ask your mechanic.
2. Remove the bolts
attached to the EGR valve and then remove the valve. Disconnect any electric wiring
carefully typically going from the EGR valve to the EGR solenoid of car.
3. Remove the
back pressure transducer.
4. After removing the
valve, use the EGR valve cleaner or carburetor cleaner to clean the area around
it. Don’t use hard cleaners as they may destroy the area.
Apply the cleaner to
the exhaust passages and intake passages.
5. Remove the carbon
deposits from the bottom of valve, plunger using a wire brush. Scrape away the
old gasket as you will be installing a new one.
6.Once you have cleaned
the valve and the passages, reinstall the EGR valve.
7. Reinstall the
transducer and reconnect all the disconnected electric wiring. Lastly install
the vacuum line. And done!
Hope with this guide
you can save your engine and fuel economy effectively. For more assistance and
purchase guide for Aftermarket auto parts visit Partsavatar.
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