mercedes fuel injector problems

When the needle valve is opened, fuel under enormous pressure is sprayed into the combustion chamber. Troubleshooting a bad fuel pump problem on a Mercedes-Benz is easy. When an injector isnt delivering fuel as it should, this interferes with the fuel-air mix in the combustion chamber. Housed inside each cylinder, they supply fuel at the exact moment and quantity to ensure responsive power output and maximum efficiency. It is called the fuel rail. But modern vehicles now have complex electronic This could be due to a lack of fuel reaching the engine from the injectors. Symptoms include a lack of acceleration when you press the gas pedal or a vehicle trying to stall. This will also help improve its performance and ensure that it runs smoothly. On turbocharged engines, a clogged or dirty fuel injector can have dangerous effects and lead to a detonation that can damage the engine. Usually, a bad fuel injector on an old-model car will show signs that will cause a cylinder misfire. learn that cleaning is the cure for most bad fuel injector problem. assist the internal combusting process. Fuel injectors are responsible for supplying fuel to the engine of a Mercedes vehicle. The most effective way to keep injectors in good working order is to have them removed and inspected at regular intervals. 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. 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Many manufacturers claim that These cleaners will give your car extra power or Increased MPG. the injector. Injectors were introduced as a replacement for the old carburettor system, since they let engines run with greater fuel efficiency and help to reduce emissions. So it is vital the each part of the system, including each injector are operating properly. Excess fuel creates a bad smell, which is noticeable while driving. means the engine will not get enough fuel in it. In most cases, you will hear the fuel pump run for several seconds until it builds the necessary pressure for the engine. The opening and closing of the valve is operated by a solenoid. Required fields are marked *. 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 the world and still made in Germany!). (6 Common Symptoms), Can a Seized Engine Still Drive? Both of these symptoms can be caused by a faulty fuel injector, most likely a clog or blockage in the nozzle. Scan the fault codes using a multi-system diagnostic scanner capable of reading fault codes from multiple control units. First off, if youre experiencing difficulty starting the engine, it could be due to a faulty fuel injector. Step 2: Set up DVOM to measure DC voltage. If your car has covered a lot of miles or ifyour engine is underperforming or randomly misfiring, it may be caused by bad fuel injectors. probably wont, or make much difference to a car that is running properly. 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. Because fuel is leaking from the If fuel falls on hot engine parts, you may cause a fire. You may have problems with the MAF (mass air flow) sensor, which can cause similar symptoms, such as the engine running rough or lacking power. Follow his Facebook page at https://www.facebook.com/benzinsider and Twitter @giancarloperlas. The ECU triggers the warning light when the injector is delivering too much or too little fuel. For a better experience, please enable JavaScript in your browser before proceeding. A faulty fuel injector can lead to a significant drop in fuel economy. Hi dear, my name is Jeffery Ekweghi, and I am a certified mechanic and autobody parts technician. Open the hood of your Mercedes-Benz. If you have a couple of hours and some basic skills in car repair, you can replace the Mercedes fuel pump for under $250 (parts) or less. So, you may need to run more checks to confirm that it is truly the Fuel injectors are used in all modern engines, and are a vital component in the fuel management system. 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. The ECU (engine control unit) uses sensors to work out the right time to fire the injectors and spray fuel into the combustion chamber. Like any other engine part, regular maintenance is the key to keeping them going. If your Mercedes doesnt start, check the fuel pressure. A proposed class action says 2015-2019 model year Mercedes-Benz W205 vehicles, including the C300, suffer from a defect that can cause raw fuel to leak within the engine compartment. (In other words, if its adding too much or too little.). manufacturers claim that These cleaners will give your car extra power or Increased MPG. A Mercedes fuel injector problem sure spells a lot of hassle for car owners. In modern common rail diesel engines, fuel pressures can be over25,000 psi. Before you replace the fuel pump, make sure the pump is getting power. To prevent any damage to your car will wet the seals, and prevent leaks. BenzWorld.org forum is one of the largest Mercedes-Benz owner websites offering the most comprehensive collection of Mercedes-Benz information anywhere in the world. It has nozzles which spray fuel into Even if it looks like there is only one bad injector, having the rest of them inspected and tested by a professional is a good idea. Thanks!https://www.buymeacoffee.com/ReviveMyRideParts are as follows:Honda diesel fuel injector seals (copper washers) part number is 1647RBDE00UK link: https://tidd.ly/2J2kDMDUSA: Not sure where to buy these in USA but you could try the Honda main car dealersIf you prefer to use the MB fuel injector seal, the part number is: A6110170060Fuel Injector Bolt - Mercedes part no. Kolkata, India Dealer just did the same trick with my 15 months old C 220 CDI. see a small metal clip that looks like a staple pin, use a small flathead It supplies the engine with fuel to Then, with your hand gloves on, grip in multi-port fuel injector vehicles. Symptoms of a Bad Ignition Control Module: What You Need to Know, Car Struggles to Start Despite Battery Being Fine. The replacement of diesel injectors is also often more complex than the replacement of gas injectors, even if it can be difficult on some gas engines also. The seals around the fuel injectors can become worn out over time due to continuous exposure to heat and vibration from the engine. finally, the worst-case scenario is to replace the bad fuel injectors which If you turn the ignition ON, the fuel pressure should build up before you even crank the engine. remember that Diagnosing any problems quickly will help prevent further damage to the injector, the fuel system and the engine. Never carry this test if the engine is hot. I am certified in private cars and heavy-duty commercial vehicles. The injector and rail will have drops of fuel, so use the shop View all posts by Giancarlo Perlas , Mercedes Engine Bogging: Common Causes and Solution, Mercedes Battery not Charging: Heres What You Should Do, BenzInsider.com A Mercedes-Benz Fan Blog, Mercedes Fuel Injector Issue: Common Symptoms and Solutions, Mercedes-AMG One Shatters Production Car Lap Record at Monza, Mercedes-AMG S 63 E Performance Now Available For 208,392.80, Rare Mittelgrn 1955 Mercedes-Benz 300 SL Auctioned For $1.82 Million, Mercedes-Benz With ic! I found that MB Dealer was charging 10 times more for the oil filter and 2.5 times for the fuel injectors than the price in Germany. When you shut off your engine, the injector will soak up the heat of the engine. This can cause difficulties in starting, power production, and performance delivery. You might also notice a drop on the fuel gauge. The Mercedes-Benz M276 is a series of 3.0-liter and 3.5-liter gasoline V6 engines with direct fuel injection system. intake manifold, lifting the injectors with it. Next, you must find out how to remove the rear seat. because fuel injection systems use one injector per cylinder, your engine may not completely shut down if only one injector isn't working. This improves fuel economy and helps to reduce emissions. However, You have an electrical problem or a bad fuel pump if you get zero readings. them looked at by a qualified injector specialist can save you money in the long term. So your engine is running badly (or not at all). Sometimes fuel injectors can develop faults which impact on their performance or cause breakdowns. Next, reinstall the fuel rail. supply of fuel into the engine and you will notice the cars revolution per By regularly inspecting these parts for signs of wear and tear, you can help reduce the risk of fuel injector failure in Mercedes vehicles. problems, this would affect the performance of the engine and the car will Often the reason why the fuel pump isnt working is that it is not getting power due to electrical problems. reduce the volume of harmful emissions their car is producing before their MOT. Regular oil and filter changes will go a long way towards maintaining a healthy engine. skills, it will take you between 1 to 2 hours. So pressure must always be within reference. Your car engine uses an internal combustion process to run and uses two key elements: oxygen and fuel. While fuel pump failure isnt very common in MB cars, we have seen several Mercedes cars such as ML320, C-Class, and E-Class models have a fuel pump go bad as early as 120k miles. But, if the new injectors you bought did This problem makes the motor feel as though it is sputtering sending vibrations through the car. Set your digital multimeter to a 20-volt setting and connect it to the two main (black and red) lines going into the fuel pump. If needed, you can replace it with a new one as recommended by your cars manufacturer. become hard to drive. Most engines in the new series are turbocharged and only 3.5L M276 . They are easy enough to maintain. the RMP falls more than necessary. The fuel injectors cost may differ a lot depending on if you have a gas or diesel engine. A malfunctioning fuel injector can lead to an uneven distribution of air and fuel mixture, which results in a rough idling engine. Another This causes the engine to run rich, leading to more fuel being used than necessary. These are the most common symptoms of EHA valve failure: Rough running: hesitation or jerking upon accelerating; difficulty in the ignition and combustion processes; slow to start. Finally, With that, read on to learn how you can go about them to prevent potential damage to your Mercedes engine. 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. see update vid link above! For example, a fault with an injector in cylinder one would give a code of P0201. Oil could also leak if there is a damaged seal which will In this video, using a step by step approach, I will show you how to fix the Mercedes CDI diesel leaking injector (Black Death) problem: including any tools or spare parts you will need.UPDATE: I have just done a video of an inspection 2 YEARS after my original repair! A fuel pressure check on your Mercedes-Benz will tell you whether the fuel pressure is within range. First, align all the injectors over their Fuel pressure in loop line is essential for D-Jetronic. If you suspect your fuel pump is not working, you must perform a fuel pressure test to verify. Hey in this article we will look at common symptoms and signs of bad fuel injectors and also offer the solution to them. The fuel pump may have failed if your Mercedes cranks but wont start. CHECK IT OUT - https://youtu.be/7weS1vQ_1OICheck out more of my videos from my HOMEPAGE and please consider SUBSCRIBING https://www.youtube.com/channel/UCDh9ld83sqnlEe4OSGRUsIARecommended tools:Injector seat cutting tool - I used a 17mm flat reamer (Note: some use an angled reamer for this but the flat one worked for me with lasting results). So, if you drive a four-cylinder car, it will most likely have four fuel injectors. Each injector is linked to the electronic control unit (ECU) that controls how much fuel is injected and when it is injected. In many cases that will solve your problems. 1. Fuel injectors control the volume of fuel delivered to the combustion chamber, ensuring the right amount is injected at the right time. (Car Battery How Many Volts). 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. line from the fuel rail to remove the rail. 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. Another thing that could cause fuel smell is a bad Finally, Reconnect the battery to The fuel injector may be spraying too much or too little fuel, which creates a lean or rich mixture, which may cause the engine to misfire and stall. Copyright 2023 Mechanic Base. And, The slight delay is to allow the fuel pump to refill the lines and Note that not all faults will trigger the check engine light. 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. This can become hard and brittle from the heat of the engine. Your email address will not be published. Most modern engines use a technique known as direct injection to get the fuel into the engine chamber. Typically, the cost of replacing a single fuel injector is around 150, but this will vary depending on the age of your car and type of injection system you have. A misfiring engine will interfere with acceleration, reduce fuel efficiency, and result in loss of power. 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. The fuel injectors with the help of high pressure, create a super fine spray pattern that will make the engine run efficiently. This also includes a fuel pump, fuel pressure regulator, various sensors and the engine ECU. When it comes to engine health and performance, the type of oil you use really does matter. For example, if you notice the check engine light on, the scanner can assist you in identifying the problem and determining if its a simple issue you can address at home or if you need to take it to a mechanic. Much like spark plugs, these injectors fire one after another, reducing the lag time and increasing the efficiency of fuel delivery. If the fuel powering your vehicle is contaminated with dirt or debris, it can cause damage to the fuel injectors and lead to their eventual demise. When the engine is This is because the injector is responsible for delivering fuel to the engine. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. When the fuel injector is bad that Fuel from the tank is routed to the injector and sprayed into the combustion chamber. egular oil and filter changes will go a long way towards maintaining a healthy engine. Fix Mercedes-Benz Sprinter Fuel Injector Problems | Mercedes-Benz USA Parts Learn About The Most Common Mercedes-Benz Sprinter Fuel Injector Problems and How To Fix Them! The engine cover can be pulled up as it is held with four tabs and no screws. Attach the metal clip, if it has one. If the injector cant deliver the dose of fuel called for by the ECU, the fuel-air mix in the combustion chamber will be off, which can lead to misfiring or a sudden drop in acceleration. Remember that ECU can only vary opening times of injectors to dose fuel. As mentioned, you may hear strange knocking or thumping sounds coming from the engine. If you notice a fuel leak in your engine bay, you should replace it immediately. A simple way to check if the fuel pump is working is to turn the ignition to position II (all dash lights will turn on). Check Engine Light One of the most obvious symptoms is that the check engine light on your dashboard is blinking. Then you can disconnect the battery. For several seconds until it builds the necessary pressure for the engine one! At the right amount is injected at the right time gas or diesel engine an commission! Mentioned, you should replace it with a new one as recommended by your cars manufacturer control... Have them removed and inspected at regular intervals are turbocharged and only 3.5L M276 running (! Pedal or a vehicle trying to stall is because the injector will up! It builds the necessary pressure for the engine of a Mercedes fuel injector can lead to an distribution! Cases, you may cause a fire out over time due to a significant drop in fuel economy can., most likely a clog or blockage in the long term 15 old. Check on your dashboard is blinking months old C 220 CDI symptoms be! And helps to reduce emissions DC voltage part of the engine to how! Uneven distribution of Air and fuel mixture, which results in a rough idling engine problem or a smell! Inside each cylinder, they supply fuel at the right amount is injected at the exact moment and quantity ensure! Delivering fuel to the injector is linked to the engine and when it to... Offering the most comprehensive collection of Mercedes-Benz information anywhere in the long term be caused by a faulty fuel can. Super Fine spray pattern that will cause a cylinder misfire and vibration from the of! Plugs, These injectors fire one after another, reducing the lag time and increasing efficiency! Reducing the lag time and increasing the efficiency of fuel reaching the engine is running badly ( or at... Heavy-Duty commercial vehicles be pulled up as it is injected at the right time have failed if your cranks... Anywhere in the nozzle regular maintenance is the key to keeping them going specialist can save money... Attach the metal clip, if its adding too much or too.... Get enough fuel in it multi-system diagnostic scanner capable of reading fault using... By your cars manufacturer so, if its adding too much or too little. ) this can worn... Commission, which supports our community attach the metal clip, if experiencing. You money in the combustion chamber, ensuring the right amount is injected at the right.! Rear seat trick with my 15 months old C 220 CDI includes a fuel pressure test to.... No screws essential for D-Jetronic fuel at the exact moment and quantity to ensure responsive power output and maximum.... Little fuel over25,000 psi it could be due to a car that running! Helps to reduce emissions rail diesel engines, fuel pressure regulator, various sensors and the engine ECU make engine!, this interferes with the fuel-air mix in the new series are and. It with a new one as recommended by your cars manufacturer pump run for several seconds until it the. Cleaners will give your car extra power or Increased MPG, the injector is delivering too much or little. Reducing the lag time and increasing the efficiency of fuel delivered to electronic. Ignition control Module: What you Need to Know, car Struggles start... Will look at common symptoms ), can a Seized engine Still Drive reduce! Is bad that fuel from the engine linked to the injector is responsible for fuel. System, including each injector are operating properly the right time multiple control units will give your car will the. Fuel is leaking from the engine Mercedes-Benz M276 is a series of 3.0-liter and 3.5-liter gasoline V6 engines direct... With a new one as recommended by your cars manufacturer become hard and brittle from the.. Effects and lead to a faulty fuel injector can cause an engine to rich... Engine is hot a cylinder misfire measure DC voltage rear seat as mentioned, you will the! It runs smoothly each injector is responsible for delivering fuel to the engine is hot and mixture... This can cause an engine to run and uses two key elements: oxygen and mixture! Injectors fire one after another, reducing the lag time and increasing the efficiency of fuel delivery system and engine!, and performance delivery can lead to a car that is running badly ( or at... Elements: oxygen and fuel give a Code of P0201 vital the each of! Cylinder, they supply fuel at the right amount is injected and when it comes engine! Cranks but wont start thumping sounds coming from the engine, the type of oil use. You Drive a four-cylinder car, it will take you between 1 to 2 hours towards maintaining a engine. Known as direct injection to get the fuel rail to remove the rear seat and quantity to responsive... Little fuel engine parts, you have a gas or diesel engine or! Your browser before proceeding many manufacturers claim that These cleaners will give your car extra power or MPG. Information anywhere in the new series are turbocharged and only 3.5L M276 in... Vary opening times of injectors to dose fuel to prevent potential damage to your car uses! Will wet the seals around the fuel into the combustion chamber, ensuring the right amount is at. You must perform a fuel pressure test to verify engine is running properly have fuel... Light one of the valve is operated by a faulty fuel injector can have dangerous effects and lead a... Parts technician their car is producing before their MOT electronic control unit ECU! To misfire right time and quantity to ensure responsive power output and maximum efficiency be pulled up it... Car will wet the seals, and performance, the injector is to. Signs that will cause a fire better experience, please enable JavaScript in your browser before proceeding or... Improves fuel economy it comes to engine health and performance, the type of oil use. Control unit ( ECU ) that controls how much fuel is leaking from the tank is to... System, including each injector are operating properly must find out how to remove the rear.... My 15 months old C 220 CDI can become hard and brittle from the is! The each part of the most effective way to keep injectors in good order. Times of injectors to dose fuel 3.0-liter and 3.5-liter gasoline V6 engines with fuel. An old-model car will show signs that will make the engine run efficiently egular oil and filter changes will a! Of 3.0-liter and 3.5-liter gasoline V6 engines with direct fuel injection system suspect your fuel,. Long term potential damage to your Mercedes doesnt start, check the fuel injector can lead to an distribution. Much fuel is leaking from the heat of the largest Mercedes-Benz owner websites offering the comprehensive... Of hassle for car owners four tabs and no screws one would give a?..., and result in loss of power Mercedes vehicle pump may have failed if your Mercedes doesnt start, the! Car vibrations will look at common symptoms and signs of bad fuel pump if you Drive four-cylinder. The metal clip, if it has one run and uses two key:. Control Module: What you Need to Know, car Struggles to start Despite Battery Being Fine other... When it is injected fuel rail to remove the rail removed and inspected regular. Drop in fuel economy and helps to reduce emissions measure DC voltage perform. Order is to have them removed and inspected at regular intervals good working order is to have them and... Perform a fuel leak in your browser before proceeding or thumping sounds coming from the tank is routed the... The if fuel falls on hot engine parts, you should replace it immediately triggers the warning light when fuel. Part of the most comprehensive collection of Mercedes-Benz information anywhere in the long term: you. Run efficiently your Mercedes-Benz will tell you whether the fuel pressure in loop line is for! Brittle from the tank is routed to the injector will soak up heat... Or not at all ) the combustion chamber learn how you can replace it immediately Being... Little. ) the check engine light one of the system, including each injector operating... Likely a clog or blockage in the nozzle not get enough fuel it! Hey in this article we will look at common symptoms ), can a Seized engine Still?! Light one of the engine fuel economy engine run efficiently a four-cylinder car, will! It will most likely have four fuel injectors and also offer the solution to them injected when... Is essential for D-Jetronic, you should replace it immediately, create super!, please enable JavaScript in your browser before proceeding running properly and result in loss of.! Did the same trick with my 15 months old C 220 CDI their! These symptoms can be over25,000 psi ( in other words, if you have gas... Result in loss of power fuel system and the engine poor performance and ensure that it runs smoothly help its. Common symptoms ), can a Seized engine Still Drive how much is... Combustion process to run and uses two key elements: oxygen and fuel mixture, which is noticeable driving. Electronic this could be due to continuous exposure to heat and vibration from the if fuel on. Exact moment and quantity to ensure responsive power output and maximum efficiency due to a significant in! Over time due to a detonation that can damage the engine by a qualified injector specialist save! New series are turbocharged and only 3.5L M276 so it is held with four tabs and screws!

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