What are Fuel Injectors?
Fuel injectors control the timing of when fuel is injected into your car engine combustion chambers and how much fuel is injected. The engine control module electronically controls them. Which also manages the air intake, the generation of a spark by a spark plug and many other actions associated with a smooth running engine. Direct injection is in most modern vehicles today.
How Do They Work
The engine control module signals the fuel injector to spray fuel into the engine cylinder. The injector is connected to a fuel rails that delivers fuel pressure from the gas tank. The solenoid in the injector is turned on, allowing the fuel to spray into the cylinder for a set amount of time. If the pressure drops this can cause problems in your injection system.
11 Most Common Bad Fuel Injector Symptoms
1. An abrupt change in the power of the engine
An abrupt change is undoubtedly one of the common signs that will make a car owner aware that fuel injector of the car has got damaged. When a fuel injector gets clogged, there is usually an irregular supply of fuel towards the engine of the vehicle. The abrupt change leads to the fluctuation in the performance of the engine. Make sure to contact an experienced mechanic and thereby determine the problem in the fuel injector system of the car.
2. Fuel injector leak
An injector leak is also one of the symptoms that will enable an owner aware of whether he needs to replace the fuel injector with a new one. A fuel leak generally happens when the fuel injector of the vehicle has got damaged or cracked, due to which fuel gets leaked out of the engine. The injectors provide fuel to the engine and if there a leakage you might have problems starting your car. Leaking fuel injectors must be replaced.
3. Misfire in the engine
A misfire generally occurs when the injector struggles a lot against the clogged foreign particles, to start the engine effectively. The misfire in the engine can easily be felt while driving the vehicle. The engine misfire is undoubtedly a serious issue, due to which this sometimes causes the engine to overheat.
4. Poor fuel economy of the vehicle
Poor fuel economy is also one of the common symptoms that will help a person realize that the fuel injector system needs to be repaired. If there is a continuous leakage of fuel due to damaged injector, then there will undoubtedly be an effect on the fuel economy of the car. Injector cleaning can help to solve the problem.
5. Rough engine idle condition
Rough idling is undoubtedly one of the common symptoms that will help a person to realize that there is an acute problem in the injector of the vehicle. A damaged fuel injector will not only affect the performance of the car when it is running but also affect the smoothness of the engine when the vehicle is the idle condition. Rough idling can produce failed emissions test in the future.
6. Lots of fuel odor from the vehicle’s engine
Bad odor is a common problem in the vehicles that have a dirty fuel injector. An injector that has partially clogged will emit the fuel odor of the un-burnt fuel from the engine. If this problem persists for a more extended period, then make sure to get the advice from an experienced mechanic. They are the person who can quickly diagnose the problem in the vehicle.
7. Increase in the vibration of the engine
Engine vibration is also one of the significant issues in a vehicle when the fuel injector gets damaged. A dead or damaged injector will result in a non-firing cylinder, and hence when an engine completes a specific cycle, it will experience a hiccup. A vibrating engine is one of the crucial reasons behind vibration in the engine of the vehicle.
8. Instant surging of the engine
Engine surging is a common symptom that will make a person aware that there is an issue in the fuel system of the vehicle. When too much of gasoline gets injected towards the engine, then it results in surging of the engine instantly. This is a condition when a car may seem to leap up at once but will face hard times in taking off.
9. Lots of fuel spots around the car
Fuel spots are also one of the vital symptoms that will help a person determine that there is an issue with the fuel injector of the car. The cause of fuel spots is leakage of fuel through the damaged injector of the vehicle. Make sure to avail the service of an experienced mechanic and replace the fuel injector at once. Also, this can mean that the airfuel ratio is low inside the fuel lines. Leaking injectors need to be replaced as soon as possible.
10. Problem while starting the engine
Facing trouble while starting the engine? This may also be one of the vital symptoms that will help a person to realize that there are faulty fuel injectors in your vehicle.
A dirty injector may affect the standard engine starting by restricting the flow of fuel towards the engine. A similar problem happens when your car has a clogged fuel filter. This is a common problem with the engines that generally happens during cold winter condition.
11. A gradual increase in the temperature of the engine
The temperature increase is also one of the vital symptoms that will make a car owner aware that the fuel injector has got damaged and it needs to be replaced.
These are some of the vital faulty fuel injector symptoms that will help a person realize that the fuel injector of his car has got damaged. It’s wise to avail the valuable services of an experienced mechanic before various other useful parts in the engine get damaged.
Diagnosing a Bad or Failing Fuel Injector
Diagnosing a bad fuel injector can be difficult. A bad injector can act the same as other components in the system when they fail, e.g., bad spark plugs, coils, wires, or other electrical problems. A step by step diagnosis process is:
- Start the engine cold and keep the engine running for only 10 to 20 seconds
- Touch each of the exhaust manifolds to find if any are not warm. Be careful if the engine is hot you can burn yourself
- Remove the electrical connection to the injector of the cold cylinder
- Check the terminals and the wires for corrosion or damage
- Confirm there is power to the injector connector
- Reconnect the connector
- Remove the spark plug wire to the spark plug of the cylinder you want to check
- Start the engine, and you need to let it run for 10 seconds
- Remove the spark plug
- If it’s wet and smells of gasoline, the injector is working. If it is dry, the injector is not your problem
