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EGR Systems
When the temperature in the combustion chamber becomes extremely hot, nitrous oxides are formed, which then turn into smog. In order to reduce such occurrence, the exhaust gas recirculation system minimizes the temperature in the combustion chamber.
1,560 Questions
What is the function of a pcv valve?
The purpose of the PCV valve is to regulate the flow of crankcase fumes into the intake manifold where they can be burned. Prior to 1963, cars had no PCV and used road draft tubes that just left the hydrocarbon emissions from the crankcase out into the open air. The PCV valve also has a secondary role as a check valve, to prevent flow back into the crankcase. This prevents potential ignition of the crankcase fumes, should the engine backfire. The PCV system is also crucial for to proper engine sealing. The system alleviates crankcase pressure, which can push out on seals and gaskets, contributing to oil leaks.
Where is the EGR valve for a 1995 Jeep Cherokee?
According to Alldata the 4.0L engine is not equipped with an EGR Valve. You don't have one on the 4.0
Where is the EGR Valve on a '98 Jeep Cherokee 4.0 Liter?
There isn't a EGR on your 98. The last year that offered that was 90. There isn't a EGR on your 98. The last year that offered that was 90. There isn't a EGR on your 98. The last year that offered that was 90.
How do you replace the EGR on a 2000 Maxima?
# The EGR valve is bolted to the rear cylinder head,at the transaxle end # Remove the air intake duct from the throttle body and air filter housing # Detach the vacuum line from the EGR valve.Disconnect the EGR pipe nut # Remove the EGR valve mounting fasteners # Remove the EGR valve and gasket from the manifold.Discard the gasket
Where is the EGR valve on a 2001 Tahoe?
Open the hood. Look at the right side of the top of the motor and you'll see a 4 inch diameter flexible plastic hose connect to it (it runs to the air filter box). Look a few inches to the left and a few inches towards the winshield from where that hose attatches to the motor and you'll see the EGR valve. It will be metal, have a round shape about 3 inches across.
95 astro van runs rough and blows black smoke?
The black smoke is usually unburned fuel from the vehicle running too rich. If the check engine light is on you can pull the codes which will give you guidance. O2 sensors are common as well as a variety of ignition & other sensors. Test components before replacing, you can spend a lot of money guessing and throwing parts at the vehicle.
What would a bad EGR valve gasket cause?
Poor performance, poor economy, rough idle, lean burn causing valve or piston problems...
Where is the EGR valve located on a 1996 F 150 with a 5.0L engine?
4.2L, 4.6L, 5.4L and 6.8L Engines 1. Disconnect the negative battery cable. 2. Remove the vacuum hose from the EGR valve. 3. On the 4.6L engine, remove the nut and brake booster bracket. 4. On the 5.4L engine, remove the DPFE sensor retaining nuts and place the sensor to the side to allow access to the EGR tube. 5. Disconnect the EGR valve-to-exhaust manifold tube from the EGR valve. 6. Remove the EGR valve mounting bolts, then separate the valve from the intake manifold. 7. Remove and discard the old EGR valve gasket, and clean the gasket mating surfaces on the valve and the intake manifold. To Install: 8. Install the EGR valve, along with a new gasket, on the manifold, then install and tighten the mounting bolts. 9. Connect the EGR valve-to-exhaust manifold tube to the valve, then tighten the tube nut to 25-35 lbs. (34-47 Nm). 10. Connect the vacuum hose to the EGR valve. 11. On the 5.7L engine, install the DPFE sensor. 12. On the 4.6L engine install the brake booster bracket and the retaining nut. 13. Connect the negative battery cable.
How does a 4 stroke engine work?
As the name states there are 4 strokes in a 4 stroke engine. Intake, when the piston draws in air/Fuel mixture. Compression, when the intake valve closes and the piston moves to the top off the stroke. Power stroke, when the compressed mixture is ignited, forcing the piston down. Last the exhaust stroke when the piston starts moving up and expells the burnt gases.
Where is the egr valve located on a 2000 ford windstar?
The EGR valve on a 2000 Ford Windstar is located on the intake manifold near the firewall. It is typically located to the left of the main throttle body or slightly lower than the throttle body.
- On the passenger side it is located on the side of the intake manifold closest to the firewall.
- On the driver side it is located on the side of the intake manifold closest to the engine.
How do you replace an EGR valve on a 2001 Ford Focus with DOHC engine?
Removal
Remove the air cleaner outlet tube.
Disconnect the mass air flow (MAF) sensor electrical connector.
Disconnect the breather pipe.
Remove the air cleaner.
Fully loosen the exhaust gas recirculation (EGR) valve to exhaust manifold tube nut from the bottom of the EGR valve.
Disconnect the vacuum line from the top of the EGR valve.
Remove the EGR valve.
Remove and discard the EGR valve gasket.
Installation
NOTE: Use a new EGR valve gasket when installing the EGR valve.
To install, reverse the removal procedure.
I believe you mean the "EGR" valve. Exhaust Gas Recirculation valve. It is an emissions control device. When the cylinder temperatures exceed 2500 degrees F the EGR valve will open to allow enough exhaust gas (which is inert) to cool the cylinder. This prevents the formation of NOX, which is a huge contributing factor to smog.
An EGR valve takes 5 - 15% of the exhaust the exits your car. You can have troubles with this part due to the carbon build up from all the exhaust passing through it causing the valve to get stuck open or shut.
EGR stands for Exhaust Gas Recirculation. EGR systems cause exhaust gas to be recirculated to the engine cylinders. Recirculating exhaust gas will reduce Nitrous Oxide emissions in diesel and gasoline engines. It does not recirculate exhaust gas in order to burn unburnt fuel. The EGR valve is the control valve which regulates the amount of EGR being recirculated. The valve is controlled form the engine management system.
Why does your exhaust blow black smoke?
Black smoke from the exhaust it a symptom of an overly rich fuel/air mixture. Have this repaired or it will destroy your O2 sensor and catalytic converter.
Where is the egr valve on a Chevy engine?
I changed EGR on a 88, 5.7 and it is located in the intake manifold near the throttle body (carb) just in front of.
What do the egr valves do on a 305 Chevy?
The EGR valve in computer controlled engines allows the computers to run the vehicle at a more lean rate without destroying valves and/or pistons. Only a small percentage of the exhaust gas is allowed back into the combustion chambers; just enough to reduce the oxygen percentage in the air mixture, thereby preventing the super-hot combustion that takes place when the fuel in the mixture is reduced. Carbureted engines are deliberately run at a more "rich" mixture to prevent the destruction of the metal parts.
Another answer:EGR. Exhaust, Gas, Recuirculation. It runs the exhaust back through the motor, to burn any unburned fuel, before exiting the tail pipe. It actually aids the catalytic converter. This is what allows the above answer to hapen.That's probably unburned fuel. The "check engine" light usually means you've got a problem with the engine emission controls. It's probably a faulty sensor or valve. I'd suggest taking it to a dealership to have the engine "scoped".
Where is the egr valve located on 1999 Astro?
It is just below the throttle body. Follow the air intake from the filter to the tb. It is cylindrical in shape and has a 5 wire connector. You can see it in mine without removing the air intake ducting.
Is removing egr valve from diesel engine legal?
No, it is no different than removing a catalytic converter.
No, it is no different than removing a catalytic converter.
Where is egr solenoid on 3800 SERIES II?
The EGR (Exhaust Gas Recirculation) solenoid on a 3800 Series II engine is typically located near the front of the engine, mounted on or near the intake manifold. It is connected to the EGR valve and is usually positioned on the driver's side. To access it, you may need to remove some components for better visibility, depending on the specific vehicle model. Always refer to the vehicle's service manual for precise location and removal instructions.
Yes, you absolutely can clean your EGR. Many times, a dirty EGR will cause a check engine light to come on, and many auto repair shops and especially dealer service centers will advise you to replace the EGR instead of cleaning it. There is no way to harm the EGR during the cleaning process, and usually it's very easy to get to and remove so there is not much to lose here by trying it.
To clean the EGR, first remove it from your vehicle and then get yourself a can of brake cleaner from any auto parts store or walmart (around $2-$3). Spray inside the EGR with the brake clean and if you have any type of cleaning utensil, such as a small brush or pipe cleaner, start scrubbing what you can inside it. Make sure that the little pintle on the bottom of the EGR moves freely as well. Often times the pintle will not move due to excessive carbon deposits and this can throw a code as well.
It can be tricky getting inside the EGR with a little brush to clean it, but just remember, it doesn't have to shine. Just do the best you can and reinstall it. Often times you can reuse your EGR gasket as well. Disconnect the battery for around 10 minutes to reset your codes if you don' have access to a scanner. Autozone, Advance auto, and O'rielly will scan and erase your codes for free if you need to go that route.
Where is egr valve located on 2004 grand am?
i want to know if a 2004 grand am , 2.2 engine has a egr valve
Where can you get an EGR Modulator Filter?
I don't know if any dealerships sell the filter alone. More likley, you'll have to buy the entire EGR modulator. You might be able to get a modulator filter in decent shape at a junk yard. Your best course of action, if your current filter is redeemable, is to clean it using compressed air. If your filter is beyond redemption, then you might try constructing a filter using materials similar to the ones used in your original filter.
What would cause black smoke to come from the tailpipe of a 97 Chevy Cavalier?
Black smoke usually means the engine is running too rich. The fuel/air mixture is incorrect. Blue smoke is oil burning.
Will a bad egr valve cause your car to idle rough or die?
It is a common suspect in contributing to rough idle.
See "Related Questions" below for more about the EGR valve, from testing to replacing.
PCV stands for positive crankcase ventilation.
They are usually right in plain sight on top of the valve cover. If you had one you probably could have changed it yourself in about 30 seconds or less.
A PCV valve helps keep a constant pressure within the engine block by releasing oil fumes when they get to a certain pressure and sending them into the fuel system to be reburned with the gas.
While they can be inexpensive, they can be very hard to locate and remove on several makes of cars and trucks. Some are internal and cannot be replaced, meaning they are located inside the valve cover.
The PCVs that can be replaced should be replaced every 15 to 60 thousand miles depending on the make and engine you have.
Shop around for a better price than you paid, $12.00 is a little steep.
It stands for positive crankcase ventilation. And what they told u was right about replacing it. All it does is prevent condensation build up and burn fuel fimes that get by the rings. The condensation will build up and create sludge and that is a bad thing because it will block oil galleries and return holes and ur engine will run oil dry and it will be fried.
pos.crankcase vent keeps pressures even in your eng.returns fumes to the intake threw the air filter houseing.easy to check shake it if it rattles it should be good put it back
The answers are correct as to what it does, and how it is to be checked, though usually the "prescribed" way to check it is not just shaking, but trying to suck, or blow, air in both directions (it should be one-way).
However I have never heard of routinely replacing this item, and have known some cheapskates actually "revitalizing" them by spraying them with engine cleaner.
As to price, $9 is too cheap for a professional oil (and filter?) change, so they nailed you for the valve, by its cost, and probably by its need.
There isn't any free lunch.
buy one and keep it in your glove box. change it every other year. it is an emmission control device. it takes blow by and directs back to be used again. it is cheap insurance and prevents sludge. change it every time you get a tune up also change your airfilter out at the same time. If your airfilter is oil soaked, it probably due to a worn pcv valve. change the valve first then change the airfilter.
The PCV Valve, or Positive Crankcase Ventilation valve is an emission control device that routes unburned crankcase blowby gases back into the intake manifold where they can be reburned. The PCV system is one of the oldest emission control devices, and also one of the most beneficial. Besides totally eliminating crankcase emissions as a source of air pollution, the constant recirculation of air through the crankcase helps remove moisture which otherwise would cause sludge to form. Thus the PCV valve extends the life of the oil and engine. The PCV valve requires little maintenance. The valve and filter should be replaced somewhere around 30,000 to 50,000 miles(see the vehicle owners manual for service intervals).
PCV is an acronym for Positive Crankcase Ventilation. This valve is needed to relieve the pressure built up in the crankcase that is created by the heating of the air inside the engine. If this valve were not present and the pressure went unchecked, it would blow out the seals and gaskets inside your engine.
PCV stands for Positive Crankcase Ventilation. This replaceable valve replaced the vent pipe on the engine, this got rid of the fumes and or pressure that builds up in the crankcase, nowadays the crankcase does not vent into the environment. with the PCV valve these fumes are returned to the intake manifold and are mixed in with the fuel intake stroke to be burned and so create a cleaner exhaust.
Pcv valveI don't think a car has been built in the last 40 years that doesn't have a PCV valve. My 1965 Galaxie had one, but my 64 Ford pickup didn't. PCV means "Positive Crankcase Ventilation", in other words actively sucking junk out of the crankcase rather than just letting it be vented to the air.The PCV valve allows unburned stuff that blows by the piston to be collected and re-burned rather than just vented to the air, without causing your engine to stall out at idle. This results in a serious reduction in air pollution at virtually no cost, which is why it was the first emissions control device employed.
Look on top of the valve cover. There should be a knob sticking out with a small diameter rubber hose attached to it. It will be inserted in a rubber grommet. You can just pull it out of the valve cover. If it's clogged it will be unnecessarily blowing junk into the air; if it's leaking, it will seriously foul up operation of your engine, especially at idle. They cost about two bucks and you can change it with your bare hands. Replace often. The book says 24000 miles/24 months. I always write the replacement date on them with a Sharpie so I can remember when I replaced it last.
