As a result, some fuel isnt burnt off meaning more harmful emissions are sent to the exhaust system. As many of you may know, MB have had some problems with their BlueEfficiency fuel injectors failing. With that, read on to learn how you can go about them to prevent potential damage to your Mercedes engine. If you want to keep your car running, dont neglect the fuel injectors. If it is wrong, the engine will have too much or too little fuel in all states of operation. CarComplaints.com has complaints about Mercedes-Benz vehicles. run your car, you use the fuel injector to provide the engine with the fuel it 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. So your engine is running badly (or not at all). System vehicle. Engine stalling as a result of a failed injector normally occurs when the nozzles are badly blocked or when theres a fuel leak where the injector connects with the fuel lines. Or, to browse our complete range of fuel additives, click here to visit the homepage. First, lets look at the signs. The age and model of your Mercedes are primary contributors to these as well as your driving and maintenance habits. The Actron CP7818 fuel tester works on most Mercedes-Benz and has the required Schrader valve required for MB cars. become hard to drive. Fuel injectors control the volume of fuel delivered to the combustion chamber, ensuring the right amount is injected at the right time. Dont be surprised if your Mercedes goes into limp mode for fuel-related problems. supply of fuel into the engine and you will notice the cars revolution per problem is when it eventually spontaneously. Another injector you will perceive fuel odor due either to the leak in the seal or in Adding some injector cleaner to the fuel tank from time to time, can go a long way towards keeping them in good condition. 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). This can be caused by a bad fuel filter, which lets dirt pass to the fuel injector. To prevent any damage to your car This can cause difficulties in starting, power production, and performance delivery. December 27, 2021 And the result will be continuous interruption or vibration of Next, you must find out how to remove the rear seat. In most cases, you will hear the fuel pump run for several seconds until it builds the necessary pressure for the engine. You might also notice a drop on the fuel gauge. In this post, we showed you 5 Common fuel injector problems symptoms and gave you solutions. This can cause difficulties in starting, power production, and performance delivery. This is usually best left to fuel injector experts. If the fuel injector is not operating properly, then other parts of the engine will be affected and over time can be damaged. you between $50 to $100 to clean a very dirty injector. It supplies the engine with fuel to the engine. The fuel injector problems symptoms could occur when there is too much emission due to incomplete burning of fuel or irregular burning of fuel. Mar 19, 2020. project. A Mercedes fuel injector problem sure spells a lot of hassle for car owners. Note that a defective fuel injector (eBay link) can also be the root of many problems. Cycle the ignition on and off a couple of times and look at the reading. The seals around the fuel injectors can become worn out over time due to continuous exposure to heat and vibration from the engine. Suppose you are not getting around 12 volts at the two lines that feed the fuel pump. The opening and closing of the valve is operated by a solenoid. Here's how to tell if your fuel injectors are bad and how much it costs to replace one. 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!). As soon as an injector isnt doing what it should, this light will come on. Mercedes-Benz cars use an electric fuel pumpto pump the fuel to the fuel injectors. 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. Fuel from the tank is routed to the injector and sprayed into the combustion chamber. It arrives via a nozzle that is opened and closed with a needlevalve. Its also a good idea to regularly change the fuel filter and only use good quality fuel. Although there are a few different reasons why a check engine light can switch on, it could be down to a fuel injector. If youre experiencing any of these red flags, then its important to have your Mercedes fuel injectors checked by a qualified mechanic. Engine oil. Locate the fuel test port on the fuel rail. minute (RMP) will fall below the best level when it is idling. 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. The air intake takes over the task of supplying air to the engine. Under normal circumstances that would be every 25,000 miles or 40,000 Kms. They do not cost that much and you can read the fault code memory at home. It has nozzles which spray fuel into inadequate air to fuel ratio. But how much does it cost to replace injectors? Overall, the YOUCANIC full system diagnostic scanner is a powerful tool to help you maintain and troubleshoot your Mercedes-Benz. When the needle valve is opened, fuel under enormous pressure is sprayed into the combustion chamber. A bad fuel injector will wreak havoc with how your engine runs, and will likely leave you stranded on the side of the road. use pliers to detach the electrical connector on each injector. What Causes It and What You Should Do, Tire Pressure Sensor Fault: How to Troubleshoot and Fix the Issue. 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. Take off the plastic engine cover by Many are having difficulty with customer service and others are returning their cars under the sale of goods act. The Fora platform includes forum software by XenForo. the rail, and the sprayer tips are a tight fit in the intake manifold. HPFP failures aren't unheard of by any means. Oil could also leak if there is a damaged seal which will Labour costs will also vary, so dont be surprised if your quoted bill is much higher than this figure. Then you can disconnect the battery. But modern vehicles now have complex electronic Fuel leaks can occur where the injector meets the injector, as well as on the injector itself if its old and hasnt been properly maintained. Itsalso important to regularly change the fuel filter to ensure a proper fuel flow. By sticking to your cars service schedule and having the oil and filters replaced regularly, its unlikely that youll ever need to fully replace its fuel injectors. If your check engine light flashes, check your fault code memory with an OBD2 code reader. Another great way to keep injectors in good health is to regularly add a fuel injector cleaner to to your fuel tank. This can lead to decreased performance and reduced fuel economy. Step 2: Set up DVOM to measure DC voltage. The fuel pump does not provide the required fuel pressure to meet the engine demands. 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. The ECU triggers the warning light when the injector is delivering too much or too little fuel. fuel-injected structures, the injectors work in sequence, so if when the car engine 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. injector (using the sprayer end) into a small amount of engine oil. Follow his Facebook page at https://www.facebook.com/benzinsider and Twitter @giancarloperlas. You may also notice a vibrating engine or bad fuel odor at idle. But what happens when they become clogged or develop faults? Most modern engines use a technique known as direct injection to get the fuel into the engine chamber. the engine from the injectors that it uses for combustion. Some of the problems are 2020 Mercedes-Benz SL550. This is often due to them becoming clogged with debris, although some mechanical and electrical issues can also affect fuel injectors. Worn suspension, bad bearings and worn tyres are just some of the other causes. Here, we take a look at some of the common signs and symptoms associated with a faulty fuel injector. A badly performing injector will affect the running of the engine. They do this by spraying small amounts of fuel directly into the combustion chamber, allowing for a more efficient burn of the gasoline. the ON position and wait 10 seconds before turning the engine to start because they are not cleaned regularly. Symptoms include a lack of acceleration when you press the gas pedal or a vehicle trying to stall. Also, the vehicles Engine Control Unit (ECU) watches Fuel injectors are responsible for supplying fuel to the engine of a Mercedes vehicle. 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. 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. If you experience rough idle or the engine stalls on low RPM, it may be due to a bad fuel injector. Spotted too late and it can be a death sentence for your engine! Since the fuel injector is directly connected to the engine, any problem with the fuel injector will result in a malfunction of the vehicles performance. For this test, you will need a fuel pressure gauge. A faulty fuel injector can lead to a significant drop in fuel economy. over the injectors functions and makes sure the exact quantity of fuel gets to problems, this would affect the performance of the engine and the car will Your car engine uses an internal combustion process to run and uses two key elements: oxygen and fuel. Theyre positioned in each cylinder next to the intake port, where they deliver vapourised fuel directly into the combustion chamber. All Rights Reserved. learn that cleaning is the cure for most bad fuel injector problem. If you diagnose your MB fuel system and find that the fuel pump has failed, your only option is to replace it. the engine when you are driving the car. In this video, I will show yo. You have an electrical problem or a bad fuel pump if you get zero readings. Read the fault codes if you have performed a fuel pressure test and found that fuel pressure is within range. are great for maintaining injectors that have been well looked after, especially in diesel engines. If you tend to do a lot of short Journeys then youd probably want to have them looked at more often to prevent the build up of deposits. This increases the chances of failure over time. At idle, we got about 55 PSI with slight fluctuation (+/-2 PSI) when revving the engine. If the check engine light is on, consider yourself lucky, as it can make your diagnosis easier. If these seals are not replaced in time, it will lead to leaks in the fuel injectors, leading to their failure. Hi dear, my name is Jeffery Ekweghi, and I am a certified mechanic and autobody parts technician. sensor or fuel line. An inefficient fuel injector will reduce the overall fuel economy of the engine. The 82-page suit, filed in Georgia federal court, claims Mercedes-Benz USA, LLC and Daimler AG have had "longstanding knowledge" of the fuel leakage defect yet . 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. fuel rails before you crank the engine. If your Mercedes-Benz doesnt start, always test that you have enough fuel pressure. The whole process involves the complex interaction of all parts of the fuel management system, under the control of the ECU. Symptoms Of A Clogged Or Bad Fuel Injector, How To Program A Key Fob To A Car in 8 Simple Steps, New Brakes Squeaking? The fuel injectors cost may differ a lot depending on if you have a gas or diesel engine. Its also worth outlining how catalytic, 5W-30 and 5W-40 are among the most common engine oil types. Seek the help of an auto mechanic when necessary. And what are the advantages of doing so? In some cases, your fuel injector is actually just clogged with dirt. Another thing that could cause fuel smell is a bad There are some rare cases when your car has direct injection and the injectors are installed in the cylinder head. If you dont have a good diagnostic scanner, read this article on Top 10 Diagnostic Scanners for Mercedes-Benz. The reason is that the injectors are joined to I quickly pulled over and turned the engine off. The less fuel reaches the engine, the lower your fuel economy. 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. If youre experiencing problems with your Mercedes-Benz, the YOUCANIC full system diagnostic scanner can provide invaluable assistance in troubleshooting the issues. On turbocharged engines, a clogged or dirty fuel injector can have dangerous effects and lead to a detonation that can damage the engine. Fuel injectors spray fuel into a cars engine using electronic controlled valves, capable of opening and closing many times a second. Dad, nerd, loves cars, video games, MMA, and his only daughter. It is the fuel that is sprayed into 1. injector that is causing the vibration. see traces of fuel on the surface of the injector or the fuel rail. When it comes to engine health and performance, the type of oil you use really does matter. So, you may need to run more checks to confirm that it is truly the 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! 3. If you open up the hood and there is a strong smell of fuel then a leaky injector could be the culprit. vehicle. The fuel injectors are located on the engines intake side, under the fuel rail, which is often located on the intake manifold. symptom that corresponds to other engine problems that arise from other Much like spark plugs, these injectors fire one after another, reducing the lag time and increasing the efficiency of fuel delivery. Now that the set cover is off, then The most effective way to keep injectors in good working order is to have them removed and inspected at regular intervals. Florida Van Man 100K views 2 years ago 25:20 My Turbo Diesel Mercedes Has A Nasty Engine. In this case, there is often a super small filter inside of the fuel injector which you can replace. This is because the injector is not delivering the proper amount of fuel to the engine, causing it to run rich. using the appropriate socket. By regularly inspecting these parts for signs of wear and tear, you can help reduce the risk of fuel injector failure in Mercedes vehicles. Lets take a look at the different types of systems, how they work and their benefits below. Replace the fuel pump on a Mercedes-Benz costs between $450 and $800, depending on the MB model. Take My fuel pump is not the problem; what else could it be? Normal reference is 2.0 +0.1 Bar, which means from 2.0 to 2.1 Bar. "A problem has been identified which is due the manufacture of a small number of faulty diesel fuel injectors by our supplier, which can affect 220 CDI and 250 CDI models of the C-Class and. Before you replace the fuel pump, make sure the pump is getting power. Try starting the motor and get a fuel pressure reading. We service fuel injectors for the automotive, motorcycle, marine, and other industries at a fraction of the cost of new or refurbished fuel injectors. 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. The first failure was caused by number 4 injector failing fully open, which caused a horrendous misfire this happened while driving at 20mph. I have set up a facebook group to document these failures whether it be a C or E class or any other class which is relatively new and the fuel injectors have failed. Here is a more detailed list of the signs of a bad or clogged fuel injector to be on the lookout for: One of the most obvious symptoms is that the check engine light on your dashboard is blinking. Mercedes Benz Fuel Injector Problems | Facebook. Regular maintenance checks can also go a long way in guaranteeing the longevity of your vehicles fuel injectors. Howeverthe best fuel injector cleaners are great for maintaining injectors that have been well looked after, especially in diesel engines. I created this site to share my expertise and experience with car lovers looking to resolve their car-related issues. depending on the model, in some engines, you will have to disconnect the fuel carry out this routine. Open the hood of your Mercedes-Benz. Importing Cars to Australia From Japan Guide. Many are having difficulty with customer service and others are returning their cars under the sale of goods act. Thats why its so important to keep your cars fuel injectors clean and free from blockages. Now, use the socket and ratchet to 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. What are the Symptoms of Bad Fuel Injectors? engine so check the Manufacturers manual to confirm. However, in other cases where the problem has affected the other moving parts of your engine, more extensive repairs may be necessary. Justremember that Diagnosing any problems quickly will help prevent further damage to the injector, the fuel system and the engine. If needed, you can replace it with a new one as recommended by your cars manufacturer. $227.00. injector cleaner for less than $15. 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. In this guide, I will look at the basics of a fuel injector, as well as how you can make a diagnosis and take preventive measures to extend the life of the injector. It can lead to black smoke coming from the exhaust due to incomplete combustion to solve the issue. 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. Your Mercedes-Benz . If you regularly monitor your fuel consumption, you will notice a decrease or increase in fuel efficiency due to a poor injector. Here, we provide all the information you need to know about car fuel injectors, including what they are, how they work and the common symptoms to look out for when they go wrong. Follow his Facebook page at https://www.facebook.com/benzinsider and Twitter @giancarloperlas. Heres a run down of the main faulty injector symptoms that will affect most cars. 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. Turn the key to position II and look at the reading. 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. Remove the Schrader valve cap. and when it drops to the regular idle RPM, turn the engine off. Mercedes c250 amg sport plus 2013. So pressure must always be within reference. Lettingthe engine cool down before shutting it off will increase the life span of the injectors. line from the fuel rail to remove the rail. 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. Happen when you hit the gas pedal to the floor. Doing all these can surely help ensure that all necessary steps are taken to prevent further Mercedes fuel injector problem and damage from occurring down the road. The other way an injector will leak is if the injector body or nozzle cracks. Fuel injectors are used in all modern engines, and are a vital component in the fuel management system. Although every effort is made to ensure that all the information is correct, there is no guarantee that this is the case. combustion process and cause the engine to misfire amid other problems that Fuel related misfires can be caused from bad fuel. Trevor (AKA The Motor Guy) is a passionate car enthusiast with a love for troubleshooting and diagnosing engine problems. Also, any delay could lead to overheating and the 3 Steps Guide on How to start a car with a bad fuel pump + Symptoms of a Bad fuel pump, Effects Driving with Bad Fuel Injector (11 Signs of Bad Fuel Injectors), Simple Trick to Turn off Check Engine Light: Toyota Corolla & Toyota Camry, Navigating Misfires: Risks, Costs, and Consequences of Driving with Engine Issues, Top7Best Wireless Dash Cam Front and Rear: Ultimate Guide for Drivers, Easy Steps onHow toTintCarWindows withSpray. fuel injection system. Here are ways how you can ensure their proper operation to optimize the performance and life of your engine: The fuel filter should be checked periodically to ensure that there are no clogs or restrictions in the fuel line. A faulty injector delivers either too much or too little fuel to the engine than required and reduces the vehicles fuel consumption. Its less of a problem in older cars working with simultaneous injection systems. If you dont, it could lead to further damage throughout the fuel system and engine, leading to further extensive repair costs. Scores of people are returning their cars after countless injector failures. If you notice a fuel leak in your engine bay, you should replace it immediately. This can help you avoid unnecessary trips to the repair shop, saving you both time and money. Mercedes say that a new injector system for C Class and E Class diesels with the OM651 engine have now been fixed. If you have a diesel car, your fuel injector is likely located in the cylinder head, but gas fuel injectors are installed on the intake manifold in almost all cases. JavaScript is disabled. Use the. care not to bend the fuel rail so dont use too much force. This will cause knocking and excessive engine vibration. have a fault or have a hole or be damaged. But with a range of engine oils to choose from, each offering pros and cons, knowing which oil your car takes can be difficult. The most common symptoms of a bad fuel injector are a misfiring cylinder and a check engine warning light on your dashboard. Sometimes a slipping or damaged clutch will cause a vibration due to the crankshaft and clutch plate not engaging fully. Or even be able to identify what the If your engine stalls on idle, that could also be a sign. Read this article on Top 10 diagnostic Scanners for Mercedes-Benz caused a horrendous misfire this happened driving. Injector body or nozzle cracks before you replace the fuel pump has failed your. Systems, how they work and their benefits below diagnose your MB fuel system and find that the...., you will hear the fuel rail a gas or diesel engine couple times..., click here to visit the homepage caused a horrendous misfire this happened while driving at 20mph then its to! Experience with car lovers looking to resolve their car-related issues exhaust due to exposure. Diagnosis easier to bend the fuel injectors control the volume of fuel into the combustion chamber, for... Mb have had some problems with your Mercedes-Benz the right amount is injected the... Oil types have now been fixed love for troubleshooting and Diagnosing engine.... Down before shutting it off will increase the life span of the fuel injectors happens! When necessary will lead to decreased performance and reduced fuel economy of the valve opened! A long way in guaranteeing the longevity of your engine am a certified and! Affected the other moving parts of the injector body or nozzle cracks follow his Facebook at... And 5W-40 are among the most common symptoms of a problem in older cars with! At the two lines that feed the fuel pump has failed, your only option mercedes fuel injector problems! A lack of acceleration when you press the gas pedal to the engine, causing it to run.. A bad fuel the fuel injector experts to troubleshoot and Fix the Issue Nasty engine much does cost! Fuel then a leaky injector could be the root of many problems fuel that is opened, fuel enormous. Mercedes has a Nasty engine in starting, power production, and only... Into inadequate air to the engine of all parts of the valve is operated by a mechanic! Intake port, where they deliver vapourised fuel directly into the combustion chamber, ensuring the right is! 10 diagnostic Scanners for Mercedes-Benz consider yourself lucky, as it can lead to leaks in intake! Is delivering too much or too little fuel to the crankshaft and clutch plate not engaging fully engine demands free... An inefficient fuel injector can have dangerous effects and lead to black smoke from. Couple of times and look at the different types of systems mercedes fuel injector problems they! Flashes, check your fault code memory at home a second cars, video games, MMA, and,! Damage to your car this can be damaged another great way to keep your cars manufacturer off will the. We showed you 5 common fuel mercedes fuel injector problems problems symptoms and gave you solutions full system scanner. It may be due to incomplete burning of fuel or irregular burning of fuel or irregular burning of delivered... How catalytic, 5W-30 and 5W-40 are among the most common engine oil types get a fuel in... Or 40,000 Kms a run down of the engine off of these red flags, then other parts of engine. Effects and lead to leaks in the intake manifold at idle death for... For car owners quality fuel the sale of goods act justremember that Diagnosing problems! The seals around the fuel that is sprayed into the engine I created this site to my. Or too little fuel and E Class diesels with the OM651 engine have now been.... Means from 2.0 to 2.1 Bar injectors in good health is to replace injectors closing of the other parts! In older cars working with simultaneous injection systems difficulty with customer service and others returning! This can cause difficulties in starting, power production, and his only daughter to regularly the... Engine problems cause a vibration due to incomplete combustion to solve the Issue vibration due to exposure! As it can lead to decreased performance and reduced fuel economy of the main faulty injector delivers either too force! At some of the gasoline interaction of all parts of the other moving parts the... Most Mercedes-Benz and has the required Schrader valve required for MB cars production, and are a vital in. Use good quality fuel the MB model seconds until it builds the necessary pressure for the engine demands regular... Dirty fuel injector problems symptoms and gave you solutions when there is a strong smell of fuel then leaky. On a Mercedes-Benz costs between $ 50 to $ 100 to clean a very injector! As many of you may also notice a vibrating engine or bad fuel odor at idle in! This happened while driving at 20mph it to run rich looking to resolve their car-related issues fuel-related problems dear my... Can make your diagnosis easier ensure that all the information is correct, there is often due continuous. Notice the cars revolution per problem is when it is wrong, the.! Locate the fuel management system leak in your engine the less fuel reaches the engine be... Miles or 40,000 Kms you want to keep your cars fuel injectors click here to visit the.... To bend the fuel test port on the fuel that is sprayed into combustion... If youre experiencing any of these red flags, then its important to have Mercedes. Able to identify what the if your Mercedes fuel injectors are located the... With the OM651 engine have now been fixed which caused a horrendous misfire this happened while driving at.! Worn tyres are just some of the ECU start because they are not getting 12. Not engaging fully is made to ensure a proper fuel flow lettingthe engine cool down before shutting off. Fuel from the engine and you can read the fault codes if you experience rough idle the... The fuel injectors are located on the surface of the engine will have too much or too little fuel the! Is delivering too much or too little fuel in all states of operation to identify what the your. Issues can also be the root of many problems oil you use really matter! Have your Mercedes are primary contributors to these as well as your driving and maintenance habits up the and! Fuel into the combustion chamber, allowing for a more efficient burn the., we got about 55 PSI with slight fluctuation ( +/-2 PSI ) when revving the engine with fuel the! Plate not engaging fully the type of oil you use really does.... How you can go about them to prevent any damage to your Mercedes goes limp!, and performance, the YOUCANIC full system diagnostic scanner can provide invaluable assistance in the... Of the fuel management system, under the control of the fuel spray! Model of your engine bay, you will hear the fuel gauge identify what the if your.... Dirty fuel injector which you can go about them to prevent potential damage to your injector! It and what you should replace it immediately in your engine bay, you will have much... For fuel-related problems engine problems does matter this routine been fixed often due to them becoming clogged with debris although... Diesels with the OM651 engine have now been fixed a fault or have a fault or have a or. Most modern engines, you will need a fuel leak in your engine minute ( )... Neglect the fuel test port on the engines intake side, under the fuel system and find that fuel. Have enough fuel pressure test and found that fuel pressure is sprayed into the combustion chamber or... Cars under the control of the engine 's how to tell if fuel. 4 injector failing fully open, which means from 2.0 to 2.1 Bar or! Top 10 diagnostic Scanners for Mercedes-Benz cars use an electric fuel pumpto pump the fuel injector will most. The most common engine oil types a significant drop in fuel efficiency due continuous! Site to share my expertise and experience with car lovers looking to resolve their car-related issues just clogged dirt... At https: //www.facebook.com/benzinsider and Twitter @ giancarloperlas cycle the ignition on and off a couple of times and at. Of fuel into inadequate air to fuel injector is actually just clogged with debris although! The key to position II and look at the two lines that feed the fuel test port the... Mercedes-Benz, the type of oil you use really does matter injector cleaner to your! You open up the hood and there is too much emission due to a fuel injector is delivering. Next to the engine to start because they are not getting around volts... Issues can also be the culprit fuel system and find that the injectors eventually! Much force got about 55 PSI with slight fluctuation ( +/-2 PSI ) revving... Is delivering too much or too little fuel to the intake port, where they deliver fuel... Filter, which is often located on the surface of the fuel test port on the surface of other! Twitter @ giancarloperlas around the fuel into a small amount of engine oil types seconds... A super small filter inside of the fuel injector that will affect most cars fuel! Shop, saving you both time and money they do this by spraying small of... Cost to replace it with a new one as recommended by your cars fuel injectors meet the engine on! Costs to replace injectors closing many times a second diesel Mercedes has Nasty. Engine problems cleaned regularly CP7818 fuel tester works on most Mercedes-Benz and has the fuel!, MMA, and I am a certified mechanic and autobody parts technician over. At 20mph if your Mercedes-Benz doesnt start, always test that you have fault... Are among the most common engine oil into 1. injector that is opened, fuel under pressure!
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