13 Symptoms of Bad Fuel Injector

13 symptoms of bad fuel injector most modern vehicles are equipped with advanced electronic fuel injection a major part of this system is the fuel injector sometimes injectors get dirty clogged or completely fail and need to be replaced in this video we will have a look at the most common symptoms of a bad fuel injector the basic function of a fuel injector is to supply the engine with fuel the injector sprays or injects fuel into the cylinder of the engine through a nozzle so that the internal combustion process can begin the fuel must be delivered at the right time in the right amount and at the correct pressure angle and spray pattern the engine control unit or ecu manages the fuel injector 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 if something were to go wrong with one or more of your fuel injectors then your vehicle's engine won't be able to perform the way it's supposed to a faulty fuel injector will either prevent fuel from being sprayed into the engine altogether or it will mess up the intervals at which it is supposed to be sprayed either way your vehicle won't run the way it's supposed to let's have a look at signs of a bad fuel injector that you can recognize early on one starting issues if proper and sufficient fuel supply is not there engine startup will suffer if there are bad injectors proper fuel will not reach the engine and hence you might face difficulty starting your engine two rough idle or engine stalls if you experience rough idle or the engine will stall on low rpm it may be a bad fuel injector it's because the fuel injector may spray too much or too little fuel which creates a lean or rich mixture leading to rough idle because your vehicle is not getting enough fuel or an uneven supply of fuel the rpm while idling drops below the optimal level and results in a rough or even violent idle if the rpm falls too low the car will actually stall and you will need to restart free engine vibrates if the engine is not receiving enough fuel it will start to vibrate as soon as it has completed a full cycle if your engine have a turbo and when the engine is in turbocharged mode at a higher rpm it requires a lot of fuel and if the fuel injector cannot do this detonation may occur causing the engine to vibrate a faulty fuel injector will cause the corresponding cylinder to not be able to fire this means that while driving the engine will vibrate or hiccup after it tries to finish each cycle without fuel for engine misfires the engine will misfire if the fuel injector is dirty clogged or does not open properly if the engine does not get enough fuel sprayed into then the engine will misfire as you drive your vehicle will struggle to accelerate or there will be a pause after you step on the gas pedal 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 slash fuel mixture is upset five poor performance an engine with faulty injectors will interfere with acceleration reduce fuel efficiency and result in loss of power this requires immediate attention as your engine could also start knocking and cause serious damage to your engine 6. engine does not reach full rpm if there are faulty injectors then all the cylinders do not contribute equal power therefore it will have hard time reaching full speed seven check engine light turns on one of the most obvious symptoms is that the check engine light on your dashboard illuminates if one of the fuel injectors is clogged or dirty and is not efficiently supplying fuel to the engine an electrical signal is sent to warn the driver please note that the check engine light can also be activated for various other reasons it is therefore recommended that you have it scanned for error codes eight fuel leak if you see a fuel leak in the engine bay it may be because of a bad fuel injector fuel injectors are often made of plastic and can crack which cause an external leak on the fuel injector if you notice a fuel leak in your engine bay you should replace it imminently because otherwise it may cause an engine fire if your fuel injector is actually broken or cracked from damage or old age then gasoline will begin to leak out of it this means the fuel won't be able to reach the nozzle but instead it will leak from the body if you check the fuel injector you will notice gasoline on the exterior or on the nearby fuel rail often the leak is coming from the fuel injector seal which deteriorates over time nine fuel odor this symptom occurs when the fuel injector is leaking or when the fuel injector does not close properly excess fuel creates a bad smell which is noticeable while driving this goes along with a fuel leak but when you have gasoline that's not getting burned due to a damaged injector or one that's stuck open you're going to smell gasoline sometimes the issue may be your fuel lines or a faulty sensor telling the ecu to inject more fuel than if necessary either way you need to find the cause of the gasoline odor and fix it right away before it becomes a big safety hazard it may be either leak into the exhaust pipe or an external leak in the engine bay which both are fatal because they can make your car catch on fire 10 engine surge if the fuel injector is spraying too much fuel into the engine cylinder this will create a surge in the engine causing your acceleration to be much slower when you drive you'll notice that the engine rpm will change noticeably under constant load rather than remaining at a constant rpm 11 bad fuel economy if you regularly monitor your fuel consumption you will notice a decrease or increase in fuel efficiency due to a poor injector a faulty injector delivers too much fuel to the engine than required and reduces the vehicle's fuel consumption if you suspect that your fuel consumption has changed it may be due to a bad fuel injector if the engine is not getting the right amount of fuel it needs for combustion then it will place more demand on the injector to supply it with additional fuel this results in poor fuel economy due to the excess fuel that the cars ecu thinks is needed but is in fact not necessary 12 failed emissions test if the fuel injector spray pattern changed and injecting too little or too much fuel into the engine your car will most likely not pass the emission test this is because too much fuel or too little will be enough to increase the emissions and the catalytic converter will not be able to do its job properly faulty fuel injector can cause an uneven or incomplete fuel burn increased emissions are a result this means your chances of failing an emissions inspection increase greatly in some cases a fuel injector leak can cause the air slash fuel mixture to be so rich that it eventually burns out the catalytic converter 13 smoke from the tail pipe incorrect air fuel ratio caused by faulty injector might cause smoke to come out of the tailpipe so if the exhaust color is changed lately it might be time to check if the injection system is working properly or not those are some of the common symptoms associated with faulty injectors if you find this video helpful please smash the like button and if you are new here consider subscribing smash that like button for more you

Channel: The AbJ Garage

Views: 400,360

Keywords: bad fuel injector symptoms, fuel injector, leaking fuel injector symptoms, symptoms of a bad fuel injector, symptoms of leaking fuel injector, fuel injectors, symptoms of a failing fuel injector, injector, how to check fuel injectors, how to clean fuel injectors, injectors, bad injector, DIY, bad fuel injector, clogged fuel injector, fuel injector cleaner, clogged fuel injector symptoms, leaking fuel injector, fuel injector cleaning, clean fuel injectors, dirty fuel injectors, FYI

Id: J5BuhtVu9Hs

Length: 8min 54sec (534 seconds)

Published: Fri Aug 19 2022