You’ve likely already read about the renowned EGR valve, the anti-pollution valve. It is not generally appreciated by drivers because it has a tendency to cause more concerns than anything else… Actually, determined by the use you are going to make of your car, it can become blocked and trigger you a lot of concerns. If this is the case, you are likely concerned about how to clean the EGR valve of your Mercury Grand Marquis ? Don’t worry, we’ve well prepared this content to help you with this process. To achieve this, we will first look at the intent of the EGR valve, then what are the failures that the EGR valve of your Mercury Grand Marquis can bring about and finally the part that will likely interest you the most, how to clean the EGR valve Mercury Grand Marquis?

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How to Clean your Mercury Grand Marquis EGR Valve: Role and Operation

Goal of the EGR valve

The EGR valve of your car has been added to diesel engines primarily to reduce pollution released by cars and to fulfill EURO requirements on Mercury Grand Marquis . It will as a result influence the quality of exhaust gas output and eradicate toxic particles, mainly Nitrogen Oxide.

Operation of the EGR valve

Before we discover how to clean the EGR valve on your Mercury Grand Marquis , we will have a look at how it works. As seen before, its task is to clean the exhaust gases, so it will be located at the engine outlet, thanks to a valve, it will be able to return the unburned exhaust gases to the engine for a second burn which will eradicate all unburned toxic particles. It will operate mainly at low speed because at high speed the combustion is enough to burn all these gases.

How to clean your Mercury Grand Marquis EGR valve: Identifying faults

The EGR valve, nevertheless very important to limit the pollution emissions of your Mercury Grand Marquis , will sadly tend to clog up because of soot/gas deposits that will accumulate in its mechanism, which will inevitably risk blocking the operation of the valve, until entirely blocking the engine unit, here are the symptoms that a faulty EGR valve on your Mercury Grand Marquis can provoke:

  • Motor light on
  • Performance loss
  • Technical assesment rejected
  • Black fumes
  • Car that grazes at low speed
  • Low RPM settings

How to clean your Mercury Grand Marquis EGR valve: In practice

And now we’ll commence the part you are most excited about, how to clean the EGR valve of your car. Here are the two techniques that you can use.

Do it yourself

How to clean your Mercury Grand Marquis EGR valve system: Without dismantle

Despite the fact this procedure is less efficient, it is however possible to consider a “rough” cleaning of your EGR valve, the truth is, you will only need to use fuel additives, similar to the products used to clean the injection. These specific solutions must be injected into the running engine, at the right operating temperature, diluted in about 20 litres of fuel and run the engine for 3 or 4 minutes in high rev to clean the EGR valve of your Mercury Grand Marquis.

How to clean your car EGR valve: With disassembly

Here is the more effective procedure, which will require enough access to the EGR valve to carry out the treatment on your own. If so, the process is fairly easy. You will need to disconnect the electromagnet from the EGR valve, remove the few screws that hold it in place, and remove it. Once these simple steps are carried out, now comes the time for cleaning. To achieve this, you will need to use a product such as solvent, petrol, oven cleaning product, which you will leave to act for ten minutes, then scrape off the rest using a scraper, finish cleaning with wire brush. If you want to go further, you can as well clean the two canal on which it is connected which may be scorched, for this, use a scraper and a vacuum cleaner to avoid dropping deposits in the conduits. You will only have to reassemble it and you will have finished cleaning the EGR valve of your Mercury Grand Marquis.

Have it done by a professional

If, your EGR valve is not reachable because of the series or the engine of your car and if removing it would cause too many complications (removing too many auto parts that hinder access for example), how to clean the EGR valve of your Mercury Grand Marquis? In such a case, it would be better rather than launching yourself into an overly complex process, you turn to an auto mechanic. He will be able to carry out the job more cleanly and will be able, if necessary, to change the valve if it is dead. The cost of cleaning determined by the difficulty of access is between 70 and 300 €.

Remove the EGR valve of your Mercury Grand Marquis

Finally, a number of people make a more radical decision to limit the risk of a failed valve. Instead of cleaning the EGR valve of their Mercury Grand Marquis, they simply prefer to block it in the closed position. This manipulation will have the result of greatly increasing the pollution released by the car, of no longer complying with pollution criteria, of having an engine warning light permanently on and in the end risk fouling the engine. We highly suggest against making this choice. If you have other questions or want to learn more about your car, don’t think twice to check out our dedicated page.

To discover more tips on the Mercury Grand Marquis, take a look at the Mercury Grand Marquis category.