You missed an important symptom, the fuel injector plunger is leaking fuel into the cylinder and causing gas to accumulate in the oil and often it will foul the plug causing a misfire. A bad fuel injector will wreak havoc with how your engine runs, and will likely leave you stranded on the side of the road. Although fuel injectors are individual, they are designed to work as part of a team with the other injectors. Your car may rattle and stop running. When they are dirty but not yet clogged, you may be able to clean them with a good fuel injector cleaner. (and Which Vehicles Have an AMG Version), How to Change Your Brake Pads (Step-by-Step), 8 Best Wire Strippers for Automotive Work (Self-Adjusting and Standard), 6 Symptoms of a Bad Fuel Pressure Regulator (and Replacement Cost), 5 Symptoms of a Bad Fuel Rail Pressure Sensor (and Replacement Cost). If a faulty fuel injector fails to inject fuel into an engine cylinder, where the fuel gets combined with air and is ignited by a vehicle's spark plugs, a no-start condition will result. A vehicle’s fuel pump pushes gasoline from the tank, through fuel lines, and into the fuel injectors. Below are the most common symptoms of a bad fuel injector and the average cost to replace them (when cracked) or clean them (when clogged). The fuel injector is a vital part of this component. Many of the above symptoms can also be caused by a bad spark plug or a bad spark plug coil. Fuel injectors inject fuel into the cylinders of your block. Fuel injectors fail because the vehicle is never driven in ideal conditions on the road. The ignition system doesn’t cause fuel issues. Either way, you need to find the cause of the gasoline odor and fix it right away before it becomes a big safety hazard. The “symptom” you would experience could be a misfire, worse fuel economy, or fuel odor from constantly running that cylinder rich. I called this mechanic to come to my house and he said one of my fuel injectors where bad so my car its only running on 5 cylinders. I know it does not seem like there is but am I missing something here in the diagnosis? Via various sensors, the ECU makes sure the injector sprays fuel at the right time and in the right amount so the correct air/fuel mixture is created. Either way, you’ll want to take care of the problem soon or the engine will be susceptible to overheating or other problems that occur when the proper air/fuel mixture is upset. Those cleaners can also be a nightmare. Rough Engine Idle: One of the most common symptoms of faulty fuel injectors is an extremely violent or rough engine idle. When the injector is off, a spring-loaded rod pushes a needle valve -- aka "pintle" -- down into that hole to block it. I use a Toyota haice power van with D4D engine turbo charger is not working could it be the result of engine malfunction when it exceed 80 kmp or injector problems. I just drained all my fuel from tank, flushed out fuel lines and fuel rail and replaced my injectors. A major part of this system is the fuel injector. Without a flush surface to seal against, the injector will not shut off, and piston damage is usually the result. So if you’re wondering if you can replace just one injector or all, the answer is almost always to replace them ALL. A fuel injector has a hole at the bottom where fuel goes into the motor. Some companies even allow you to ship them your dirty injectors where they’ll clean them for around $15-$20 each and then ship them back. When you shut off your engine; the injector will soak up the heat of the engine. There are a few basic problems that fuel injectors can have. This article focuses on the most common, which is when the fuel injector doesn't spray any fuel at all due to an internal short circuit. Thanks for bringing that up. In some cases, a fuel injector leak can cause the air/fuel mixture to be so rich that it eventually burns out the catalytic converter. Automotive engine performance is negatively affected when an automotive fuel injector goes bad. I just bought the truck a couple months ago and the previous owner already replaced to injectors. Using non-OEM parts can save you some money while certain makes/models of vehicles can run upwards of $2,000 for a replacement. This means the fuel won’t be able to reach the nozzle but instead, it will leak from the body. This means that while driving, the engine will vibrate or hiccup after it tries to finish each cycle without fuel. A faulty fuel injector may cause a rough engine idle if it fails to deliver a steady, constant stream of flow to a vehicle's engine. Hard to say. ok so I have a 1985 Toyota Cressida and basically its wronging like ****. For replacement parts, we recommend: PartsGeek.com. I've replaced spark plugs wires and basically did a tune up. The fuel injectors atomize the fuel and send it as a steady and straight jet of fuel, to the engine to fire up. hi I have a 2012 s-max titanium I have four codes that is stored they are p0093,p0094,p0096 and p1168 the first 2 codes I think are fuel leaks p0096 intake air temperature sensor 2 circuit bank 1 and p1168 is fuel range sensor in range low failure I’ve changed the fuel filter so far the car starts and have no problem when driving but engine malfunction comes on when speed is 60+ mph what would be the next steps any info would be great. A car that has a bad fuel injector will often have a rough, or choppy, engine idle. If one click is louder than the rest, I’d start investigating what could be the cause on that cylinder. Many experts recommend that the fuel injectors be cleaned every 30,000 miles or so. As injectors get dirty and the fuel flow becomes restricted, the computer will attempt to adjust the fuel flow by opening the injector longer through the use of its Long Term Fuel Trim function. If any of the vehicle’s fuel injectors have an issue, the air fuel ratio of the engine will be upset, which can result in performance problems. In other words, just because you have an engine misfire doesn’t mean the fuel system is the cause. Below are 9 signs of a bad fuel injector that you can recognize early on. Fuel injectors are considered to be dirty when the hydrocarbons and additives which all forms part of todays fuels, together with engine gunk and carbon, cause the injectors to become restricted. 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