What does egr valve do

Most modern engines now need exhaust gas recirculation to meet emissions standards. However, recent innovations have led to the development of engines that do not require them. This exhaust mixes with the intake air and actually cools the combustion process. Cooler is always better inside your engine.

Your engines computer is trying to lean the air fuel mixture out. It does this by taking a sample of the exhaust gas and introducing it into the incoming air thus leaning the mixture out. Tech spec covered well by previous posts. Now you need to find competent repair service shop.

DO NOT return to the bloke(or pay at) any place that needs to replace entire system! The purpose for that is to introduce an inert gas to the mixture which lowers combustion. The main body of the unit contains a valve which opens under certain conditions to allow a certain amount of exhaust gas into the intake manifol where it then mixes with the fuel and air mixture and cools the combustion process. Then, unbolt the valve , and clean the return tube and entry port using carburetor cleaner, and a toothbrush or pipe cleaner. But if your MAP sensor is your buddy, your exhaust gas recirculation (EGR) valve is the bully with the huge forehead who stole your lunch money and pants’d you in front of the cheerleaders.

The exhaust gas recirculation valve is a component commonly found on many road-going vehicles. It is a part of the vehicle’s exhaust gas recirculation (EGR) system, an emissions system designed to recirculate exhaust gases back into the vehicle’s intake in order to reduce cylinder temperatures and NOx emissions. It is an emissions control device that re-introduces hot exhaust gases back into the combustion chamber to re-burn with the incoming fuel. This only happens during certain driving conditions, and load conditions. How to Test an EGR Valve : A Simple Procedure.

EGR valve on ANY car does the same thing. A positive back-pressure valve will not hold a vacuum or operate without positive back-pressure. It does this by reducing the amount of oxygen in the cylinders and thus the amount of fuel needed to keep a sane engine temperature while at cruising speeds. Exhaust gases have already combuste so they do not burn again when they are recirculated.

EGR ” stands for exhaust gas recirculation. Blocking the EGR will result in an increase in emissions as well as problems with the engine and exhaust system. Emissions The EGR system is designed to reduce emissions, specifically the creation of NOx. When The Egr Valve Comes Into Operation, Exhaust Gases are Diverted From The Exhaust Manifold To The inlet Manifold Via The EGR Valve Unit. Spray the EGR retaining bolts with rust penetrant and let them sit while you disconnect the electrical and vacuum lines from the valve (label the vacuum lines so you know which ports they came from).

But the article just tells what EGR is, and ends by saying “All we can do at this point is keep replacing failed EGR coolers, and fixing all the major issues caused by EGR. I don’t see where the article said what EGR delete is. Local Ford shop told me it was the EGR Valve so as you were saying it wouldnt cause a limp mode but in my case i believe it did and if i did take it off does that void the warranty? An illuminated Check Engine Light is another symptom of a bad or failing EGR control solenoid.

If the computer detects an issue with the EGR solenoi circuit, or system, it will set off the Check Engine Light to notify the driver of the issue. Some of the manifestations of this include rough idling and even a feeling of hesitation when you try to accelerate. Update: i know what an EGR does and looks like, agin im a honda mechanic,.

Multi Award Winning Car Parts and Accessories Website MicksGarage. The problem causes pollution on the environment, and the vehicle to run poorly. Diagnosing the problem is simple with the right expertise, and repairs are just as simple.

Common Symptoms of a Bad EGR Valve.

Many diesel truck owners want to improve engine longevity, and overall performance. What is an EGR Delete Kit? There are several aftermarket parts that can assist with these goals but few are as efficient or beneficial as an EGR delete kit. How Much Does EGR Valve Replacement Cost. I’ve noticed my car has been huffin’ and puffin’ like an asthmatic kid who ran a marathon.

The debate is whether or not removing the entire EGR system, and getting a tune to take it out of the ECU will allow for performance gains. Exhaust Gas Recirculation ( EGR ) valves do exactly what they say, Recirculate Gas. The most common symptoms of a bad exhaust gas recirculation valve are rough or misfiring idle, detonation, stalling and hard starting. The next step is to allow your engine to completely cool down, disconnect the battery, and wait minutes while the system fully discharges. The engine produces nitrogen as part of the combustion process.

This way it is better for my car and “check engine light” will not come on. Now, “ EGR Valve ” on my car is disconnected. I do not feel any difference in engine, except that it idles little bit rough, but it does not bother me. However, I am worried that having it disconnected will damage my car engine. The EGR system does lead to carbon deposits in the intake and these can be greatly reduced by cutting back on the EGR amount after the engine is warmed up.

He claims that maintains the environmental and longevity benefits of the EGR will minimizing the carbon build up. This in the reduction of nitrogen oxide emissions. Recirculation of the exhaust leads to a gradual accumulation of carbon particles inside the inlet. The egr valve recirculates exhaust gas through the engine to help reduce emissions. In this instance you would replace the egr valve.

Exhaust gas recirculation is a NOx emission control technique applicable to a wide range of diesel engines from light-, medium- and heavy-duty diesel engines right up to two-stroke low-speed marine engines. If the valve has a piece of carbon stuck in it holding it open, you would clean it. The configuration of an EGR system depends on the required EGR rate and other demands of the particular application.