While this step might seem counterintuitive, it makes it possible for modern engines to run efficiently and for longer. The combustion mix maintains the lower combustion temperature that keeps the NOx emissions low, as well. The exhaust fumes are definitely beneficial but they can clog the valve once they accumulate over time. This can cause clogs on the valve and a host of other engine problems. Experts agree that the valve must be cleaned every few years.
You can use the 50,mile gauge as a point of reference for when you need to do the cleaning. Now that you understand the function of the EGR valve and why it might need cleaning, the next step is to determine when cleaning should be done or necessary.
This is an important step to know because a lot of people end up throwing away their valve when in fact a little cleaning could still restore its function. The EGR Valve is emission-related so the symptoms are not too obvious.
But if you know what to look for, then you can tell that it is time to clean your valve. These are some of the symptoms to look out for:. Follow this step-by-step guide on how to clean an EGR valve to optimize the performance of your vehicle. When you are done cleaning, replace the EGR valve to its original location. Check to see if the device works. You will know that the cleaning was a success if the Check Engine display is no longer on. Load More.
Citroen C3 EGR carbon cleaning with client review. Faulty Engine? X Book a Service Call an agent Enter your postcode. Which services are you interested in? Sign up to our newsletter for new service updates and price promotions. To better understand your driving conditions please enter your postcode. Does the vehicle produce excessive exhaust smoke or has it failed an MOT emissions test? Full Name. Join our mailing list Sign up for great offers , car care performance tips and more!
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Choose performance, economy or a mixture of both to suit your requirement plus an engine carbon clean service Book. Hydrogen engine carbon cleaning and injector cleaning plus FREE diagnostics recommended for non-turbo vehicles Book. Hydrogen, injector and chemical engine carbon cleaning plus FREE diagnostics recommended for turbo vehicles Book.
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NOTE: Call to check compatibility with your vehicle. DPF Cleaning. First, we will complete a thorough check and diagnosis of your vehicle and the DPF system. Then a DPF clean will be performed and the computer will be reset before a test drive to ensure success. Then a DPF clean will be performed and the computer will be reset before a test drive to ensure the success of the DPF cleaning.
Then a 1-stage Hydrogen engine carbon cleaning service will also be provided to ensure your engine is running at optimal levels! Learn why people trust wikiHow. Download Article Explore this Article methods. Tips and Warnings. Things You'll Need. Related Articles. Article Summary. Method 1. Clean and inspect the vacuum hose. Remove the vacuum hose and inspect closely for wear cracks or weak spots , then clean out the carbon deposits either with a spray can of carburetor cleaner or with a pipe cleaner if the deposits are hardened or compacted.
Inspect the EGR valve for damage. Loosen any bolts fastening the EGR valve to the engine. Inspect the gasket lining the bottom plate of the valve. If it's not frayed or cracked, you can reuse it. Clean the return tube and gas entry port. If there is a lot of carbon build up around the EGR valve, you may also want to just save yourself some time and replace it with a new one. Clean out the entry port.
The entry port is where the valve tubes connect to the engine usually the intake manifold while the EGR valve is off. Reinstall the EGR valve. Check to ensure the vacuum diaphragm moves freely, reinstall the EGR valve and reattach the exhaust return and vacuum hoses. Method 2. Disconnect the negative battery cable. By removing the negative battery cable from the battery, you ensure no current is flowing through the system and avoid short-circuiting the electronic component that controls the valve.
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