If you plan on running up high mileage on your car, then there are a few things you can do to help. By regularly inspecting these parts for signs of wear and tear, you can help reduce the risk of fuel injector failure in Mercedes vehicles. By accessing MB Medic [www.mercedesmedic.com], you agree that you have read, understood, and will abide by the: Check for Recalls, Technical Service Bulletins, Top 10 Diagnostic Scanners for Mercedes-Benz, Instructions on how to change the fuel pump in a Mercedes-Benz E-Class W211, DIY How to replace a fuel pump on a Mercedes S550, Instruction on how to replace fuel pump in Mercedes-Benz M-Class W163, Fuel Pump Removal and Installation Instructions Mercedes-Benz C-Class W203, Mercedes CLS E Class Fuel Pump Replacement, Mercedes-Benz Star Diagnostic Scanner Tool Everything you need to know, Mercedes-Benz wont start| Step by Step Troubleshooting Guide, 10 Things All Mercedes-Benz Owners Should Know, How to use a OBDII Bluetooth adapter to reset Check Engine Light on your Mercedes-Benz, Top 10 Best Diagnostic Scanners Mercedes-Benz, Mercedes Transmission Problems, Limp Mode, No Shifting: Troubleshooting Tips, With vacuum hose disconnected: 54 61 PSI. It is called the fuel rail. Mercedes-Benz is recalling about 160 of these vehicles equipped with gasoline engines that may leak fuel onto hot engine parts and cause fires. When the fuel injector is bad that Each injector is linked to the electronic control unit (ECU) that controls how much fuel is injected and when it is injected. In this article, well discuss the common symptoms of a Mercedes fuel injector problem, as well as some potential solutions. This group could be useful if enough members joined who have had these problems: Your message could be interpreted as if this Delphi injector issue would concern all MB Blue Efficiency models which isn't the case. This will tell you if the Engine Control Unit (ECU) has logged any errors. The Fora platform includes forum software by XenForo. A fuel pressure check on your Mercedes-Benz will tell you whether the fuel pressure is within range. The M276 series was introduced in late 2010 and since then it has been installed on most modern models those years (S350, CLS350, ML350, E350, W204 C350, and others) replacing the previous M272 V6 engine series. When you turn the ignition on, listen carefully to the rear seat (near the fuel tank). He has been working as a car mechanic for over 10 years, and the majority of them specialized in advanced car diagnostics and troubleshooting. You will use a little pressure BUT keep in mind. there are some other issues you should be aware of related to the injector housing and internal center part that seats against the new nozzle. 1. While a professional mechanic may charge Nonetheless, refer to your vehicle owners manual, mechanic, or dealership to confirm the recommended servicing intervals of your auto just to be sure. Both of these symptoms can be caused by a faulty fuel injector, most likely a clog or blockage in the nozzle. Changing the fuel pump on a Mercedes-Benz is quite easy, especially on E-Class, C-Class, S-Class, and ML models. vehicle. This guide is for an Engine Fuel inspect the injectors with a flashlight for fuel leaks. Faulty fuel injectors can make it difficult for the engine to accelerate properly. This improves fuel economy and helps to reduce emissions. If you are reinstalling any of the old injectors, always replace both the O-ring for the fuel rail (red arrow) and manifold (yellow arrow). How Much Does It Cost to Replace Fuel Injectors? Here's how to tell if your fuel injectors are bad and how much it costs to replace one. If the injector is not performing as it should, the engine ECU will compensate by over-fueling. causes the car to do convulsive or rough idling. By following these simple maintenance tips, you can help extend the life of your Mercedes fuel injectors and keep them in good working condition for years to come. Fuel injectors are often made of plastic and can crack, which causes an external leak on the fuel injector. For example, a fault with an injector in cylinder one would give a code of P0201. Dad, nerd, loves cars, video games, MMA, and his only daughter. But, if you need to replace the old Here, well highlight the symptoms of a clogged catalytic converter and explain the problems that can occur as a result. Usually a problematic cold start injector will display a few symptoms that can alert the driver that a potential problem has occurred and needs to be serviced. Disconnect the fuel lines from the filter. Follow his Facebook page at https://www.facebook.com/benzinsider and Twitter @giancarloperlas. and being stranded on the highway, it is important you detect fuel injector using the appropriate socket. injector you will perceive fuel odor due either to the leak in the seal or in Although every effort is made to ensure that all the information is correct, there is no guarantee that this is the case. As a result, some fuel isnt burnt off meaning more harmful emissions are sent to the exhaust system. Sequential fuel injection is a type of multi-point fuel injection wherein the injectors can fire independently in a sequence, rather than all at once. (Car Battery How Many Volts). Because fuel is leaking from the the injector and work it back and forth while pulling it to remove it from the the engine when you are driving the car. A faulty fuel injector can lead to a significant drop in fuel economy. This is a list of Mercedes fuel pumps for different MB models. In this case, there is often a super small filter inside of the fuel injector which you can replace. Mercedes-Benz of Lynchburg Are you sure you want to change your dealer? As soon as an injector isnt doing what it should, this light will come on. This kit has the right stuff you will need to rebuild your diesel fuel injectors yourself in your own garage! And, The air intake takes over the task of supplying air to the engine. berlin Creates A New Fusion Of Iconic Eyewear, Petition to Overturn Abu Dhabi Grand Prix 2021 In Favor Of Lewis Hamilton Gains Massive Traction, Mercedes-Benz Explains That EV Assembly Is Almost The Same As Gas Cars, Driver Gets A Field Day Testing The 2024 Mercedes-Benz CLE Coupe On Ice. see traces of fuel on the surface of the injector or the fuel rail. Use the lowest range possible if the meter doesn't auto range. Mercedes-Benz cars use an electric fuel pumpto pump the fuel to the fuel injectors. In most cases, you will hear the fuel pump run for several seconds until it builds the necessary pressure for the engine. Add your complaint here, about any vehicle. And the result will be continuous interruption or vibration of JavaScript is disabled. Any possible fuel leakage should be investigated straight away. Fuel injectors spray fuel into a cars engine using electronic controlled valves, capable of opening and closing many times a second. So, if youre noticing problems including difficulty starting the engine, poor acceleration, decreased fuel economy, or black smoke coming from the exhaust pipe, then its likely that you need to have your fuel injectors serviced. relate to the smooth performance of the vehicle. If you suspect that your fuel consumption has changed, it may be due to a bad fuel injector. Note that a defective fuel injector (eBay link) can also be the root of many problems. Labor usually costs between $50 and 200$. This job requires you to be extremely careful because you will work near fuel, and there is always a fire risk. Your Mercedes-Benz . This happens due to inadequate Vibration is a fuel injector problem The fuel pressure regulator should be checked periodically to ensure that it is operating correctly and releasing the correct amount of fuel into the engine. Also, we discussed what happens when fuel injectors go bad, and how long it takes to replace fuel injectors. Replace your fuel pump's fuse in the fuse box. This could be due to a lack of fuel reaching the engine from the injectors. UK link: https://amzn.to/3Ai7HHSUSA link: https://amzn.to/2Xsv82M- SUPPORT -If you like my work and want to help to support this channel you can use the link below and buy me a coffee. Itsalso important to regularly change the fuel filter to ensure a proper fuel flow. The fuel injectors cost may differ a lot depending on if you have a gas or diesel engine. This will affect the But with a range of engine oils to choose from, each offering pros and cons, knowing which oil your car takes can be difficult. Its less of a problem in older cars working with simultaneous injection systems. Pro Tip: Before you fix the new fuel injectors, put the tip of the The ECU (engine control unit) uses sensors to work out the right time to fire the injectors and spray fuel into the combustion chamber. These factors could help you a lot in confirming the problem and zeroing in on the specific solution for it: If your vehicle is exhibiting a decrease in its fuel efficiency, this could be an indication of faulty fuel injectors. *Interested to see how it is holding up??? will wet the seals, and prevent leaks. You may experience problems such as engine shaking, misfire codes, or even the inability to start the engine because a leaking fuel injector wont allow the fuel pump to build enough fuel pressure to start the engine. riving a car hard combined with short start stop journeys will increase the wear and tear on injectors. 4. Connect your fuel pressure tester. Mercedes may jerk during acceleration from a stop. Fuel related misfires can be caused from too much fuel. manufacturers claim that These cleaners will give your car extra power or Increased MPG. *Note that under normal operation, the fuel pressure should build up as soon as you turn on the ignition before you even crank the engine. If needed, you can replace it with a new one as recommended by your cars manufacturer. Allow the engine to work a little You will notice that the fuel pressure didnt change much when RPMs were kept constant at 4000, 2000, and idle, which is a good sign. This will also benefit the rest of the engine too. Can a bad fuel pump or fuel regulator trigger the check engine light? Fuel injectors control the volume of fuel delivered to the combustion chamber, ensuring the right amount is injected at the right time. Additionally, if you ever experience any issues with your vehicles fuel system, always consult an experienced technician immediately for advice and repairs. CarComplaints.com has complaints about Mercedes-Benz vehicles. If you have difficulty finding the fuel pressure port (Schrader valve) on your Mercedes, start from one of the fuel injectors and follow the fuel rail. If your Mercedes-Benz doesnt start, always test that you have enough fuel pressure. problems, this would affect the performance of the engine and the car will Remember, if you want to try an injector cleaning, the best way is to do it to all injectors at once to avoid the different amounts of fuel spray after the cleaning. rail until it stops. Lets look at the top fuel problems and how you can troubleshoot some of them. Now, press the injector into the Do not start the car. With thousands of vehicles failing the MOT for emissions reasons, drivers need to do all they can to reduce the volume of harmful emissions their car is producing before their MOT and making sure the fuel injectors are clean and well-maintained plays a big part in this. This problem makes the motor feel as though it is sputtering sending vibrations through the car. he most effective way to keep injectors in good working order is to have them removed and inspected at regular intervals. Another case is that the fuel injector needs some lubrication because it has been standing unused for a while, especially if you have been driving on ethanol. This doesnt really tell you anything, except that there is a problem with the engine. The most common cause of leaky injectors is the failure of the O-ring where the injector meets the fuel rail. You will pay about $300-$450 for parts (fuel pump) at the dealer. And, it will take about 1 to 2 hours to complete this When the injector is not working properly, it can cause the engine to run lean, which means that theres less fuel being burned. It is therefore recommended that you take your car to a garage and have it scanned for error codes. 2. Then you can disconnect the battery. Always disconnect the negative battery terminal before working on your fuel system. fuel injector with a new one, on a do it yourself basis, with intermediate Second, if youre noticing poor acceleration or decreased fuel economy, this could also be due to a problem with the fuel injector. Diesel injectors are often very expensive, which can result in part costs of $400 or more. It will either become clogged internally, or will failmechanically. For this test, you will need a fuel pressure gauge. For a better experience, please enable JavaScript in your browser before proceeding. You should get around an 11-13 volt reading. 1) Mercedes-Benz M276 HPFP Issues. How Much Does It Cost To Replace An Alternator. If the fuel injector is not operating properly, then other parts of the engine will be affected and over time can be damaged. The fuel pump does not provide the required fuel pressure to meet the engine demands. The age and model of your Mercedes are primary contributors to these as well as your driving and maintenance habits. Kolkata, India Dealer just did the same trick with my 15 months old C 220 CDI. If fuel falls on hot engine parts, you may cause a fire. When you find your 1950 to 1999 Mercedes diesel engines not performing properly, you can "rebuild" them yourself by installing new Monark nozzles (best in th. fuel injector. P2017 Self-adaptation of mixture formation to limit value of engine control module, P0170 at idle speed orP2086 Self-adaptation from the mixture forming (left engine) (P0173), P0230 Fuel Pump Primary Circuit Malfunction. will also benefit the rest of the engine too. Heres a run down of the main faulty injector symptoms that will affect most cars. Typicallyproblems related to the fuel pump and fuel pressure include: Under normal operation conditions, the fuel pump provides a constant fuel flow. Kent explains the other \"issues,\" starting with the extreme importance of not allowing the slightest bit of dirt to get into the injector housing or nozzle. 4. The other way an injector will leak is if the injector body or nozzle cracks. care not to bend the fuel rail so dont use too much force. You may experience poor fuel economy when the injectors are clogged or leaking. This can become hard and brittle from the heat of the engine. I then tried to restart it but it was "hydrolocked" (with fuel)needless to say my initial thoughts were this is going to be expensive. Be mindful of the following signs of fuel injector failure in Mercedes because of the potential risks that can go with them. Note that when you turn on the ignition, the fuel pump gets voltage for about 5 seconds to prime the system. probably wont, or make much difference to a car that is running properly. (How to Diagnose and Fix). Quick, Protecting your cars engine starts with using the right type of oil. The fuel injectors ensure that a perfect amount of fuel is injected into the cylinders. assist the internal combusting process. But what happens when they become clogged or develop faults? If your Mercedes doesnt start, check the fuel pressure. The fuel pump may have failed if your Mercedes cranks but wont start. Heres a list of the most common reasons why a fuelinjector fails: Over time the nozzle of the injector can become dirty, and partially blocked. Theyre more accurate and precise than single-point injectors, and make it much easier to achieve the correct fuel-air ratio in the engine. You might also notice a drop on the fuel gauge. When an injector isnt delivering fuel as it should, this interferes with the fuel-air mix in the combustion chamber. So it is vital the each part of the system, including each injector are operating properly. Mercedes c250 amg sport plus 2013. Fuel injectors are an essential part of your cars engine, delivering fuel at the right time to ensure clean and efficient combustion. Justremember that Diagnosing any problems quickly will help prevent further damage to the injector, the fuel system and the engine. This requires immediate attention, as your engine could also start knocking and cause serious damage to your engine. Now insert the key and turn it to This can be caused by a bad fuel filter, which lets dirt pass to the fuel injector. Does your car often misfire? This causes any fuel left in the injector to evaporate, leaving behind hard deposits inside the injector. HPFP failures aren't unheard of by any means. Open the hood of your Mercedes-Benz. it whenever you cover 30, 000 miles. Replacement fuel pumps for Mercedes can be purchased online to save money. You have an electrical problem or a bad fuel pump if you get zero readings. Does your engine randomly stall or cut out without you doing anything to cause it? It supplies the engine with fuel to 1. The ECU triggers the warning light when the injector is delivering too much or too little fuel. But how much does it cost to replace injectors? 120 degrees can be measured by turning the nut so that the nut edge which had been marked has been turned through 1/3 of a full turn, or through two nut flats. Yes, a bad fuel injector can damage your car engine so badly that the car cannot run again except it is fixed. The most effective way to keep injectors in good working order is to have them removed and inspected at regular intervals. Copyright 2023 Mechanic Base. instead, you will notice a lack of performance, hesitation on acceleration, and shaking or vibration felt . In most cases, the injectors may simply need to be cleaned or replaced. Because the nozzles are so small, the fuel is atomised, which makes it burn more efficiently. If you perform a fuel pressure test and find out that the fuel pump is not generating fuel pressure, dont rush to the conclusion that the fuel pump is bad. This can be dangerous and is a common cause of engine fires. The Engine Misfires Dirty fuel injectors may cause your vehicle's engine to misfire. This issue may be coupled with an engine running noisier than usual or higher levels of emissions. Finally, we showed you how to replace a fuel Injector. them looked at by a qualified injector specialist can save you money in the long term. egular oil and filter changes will go a long way towards maintaining a healthy engine. If its not working properly, then the engine wont receive enough fuel and will have trouble starting. Pro Tip: Following this step normally depressurizes the fuel system Links to where you can buy a Mercedes fuel pump are provided below. If there is something wrong with one or more of your cars fuel injectors, then it wont run properly, or may not run at all. Meaning Of Chevy Volt Propulsion Power Is Reduced Message. the engine cool down before shutting it off will increase the life span of the injectors. You will need to have the car ECU scanned for error codes to be absolutely sure that its an injector problem. Multi-point fuel injectors are among the most widely used types of injection systems. Available for both petrol and diesel engines, our range of specialist cleaning products remove particles from the fuel injectors which may be causing a blockage. On turbocharged engines, a clogged or dirty fuel injector can have dangerous effects and lead to a detonation that can damage the engine. So do take some time to observe all The high pressure fuel pump (HPFP) is responsible for delivering fuel at incredibly high pressures to support the direct injectors. When this occurs oil will leak from This can often be accompanied by a shaking sensation while the car is at standstill or stopped. Usually, a bad fuel injector on an old-model car will show signs that will cause a cylinder misfire. The most common sign of a bad fuel injector is the check engine warning light, which appears on the dashboard. Use the links below to navigate the guide. the RMP falls more than necessary. Whats the next step in diagnosing a problem with the engine injectors? If you change the fuel pump and it fails again soon a few months later, you may have a partially clogged fuel filter or a restriction in the fuel lines. Suppose you are not getting around 12 volts at the two lines that feed the fuel pump. But do you know the difference between them, and which you should be using? the rail, and the sprayer tips are a tight fit in the intake manifold. Or, maybe theres a delay after you press the accelerator pedal? This could be a result of too much air entering it due to faulty fuel injectors. The whole process involves the complex interaction of all parts of the fuel management system, under the control of the ECU. Be continuous interruption or vibration felt appropriate socket driving and maintenance habits can often be accompanied by a fuel. You anything, except that there is often a super small filter inside of the following signs fuel. 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