Symptoms of Faulty Fuel Injectors


Faulty fuel injectors can have a serious effect on your car’s performance and can lead to untimely car break downs and significantly expensive car engine repairs. The following article will discuss several key symptoms of faulty fuel injectors. It is always best to have your car repaired if you notice any of these symptoms.

Violent Engine Idle One of the most common symptoms of faulty fuel injectors is a rough, choppy, or violent engine while you are sitting idle. A fuel injector’s responsibility is to put fuel directly into the engine cylinder via the fuel rail before it is burned during combustion. If this process is not done properly or efficiently, a choppy engine while sitting idle will occur.

Gasoline Leak The next common symptom of faulty fuel injectors is gasoline leaks. Fuel injectors can crack and break, which in turn causes a gasoline leak. If the faulty fuel injector is causing a gasoline leak, the spilled gasoline will be both visible and will cause a smell. A cracked fuel rail could also cause a leak.

Poor Fuel Economy Another common symptom of faulty fuel injectors is poor fuel economy. As mentioned earlier, a cracked fuel injector or fuel rail can cause a gasoline leak, which in turn will decrease fuel economy. A faulty fuel injector also may inject too much gasoline into the engine, which is wasteful, less efficient and will lower your car’s fuel economy.

Surging Engine If you feel your engine surging, your car may be suffering from faulty fuel injectors. A surging engine is caused by too much gasoline being injected into the engine. This can cause the engine to surge too fast and then accelerate too slowly. To the driver, this condition will feel like an up and down motion.

Misfiring Engine Another symptom of faulty fuel injectors is a misfiring engine. This will occur if your fuel injector is not sending in enough gasoline into the engine. This symptom may also be caused by clogged fuel injectors. To the driver, the misfiring engine will feel like a delayed acceleration when you touch the accelerator.

In conclusion, there are various symptoms of faulty fuel injectors including violent engine idling, gasoline leaks, poor fuel economy, surging engine, or a misfiring engine. To prevent a future car break down or expensive engine repair, be sure to have your car looked at if you are experiencing any of these issues. It could be that your fuel injectors are just clogged, in which case the repair is cheap. If a fuel injector needs to replaced, the total repair bill could be around Rs 40000.

Ignition Coil Failure Symptoms


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The ignition coil takes power from the battery and relays it to the spark plugs, which burns fuel, which makes your car run. If one or more of the ignition coils fail, your car’s ability to run efficiently will be greatly hampered. The degree to which, and the number of ignition coils that are failing, as well as the total number of ignition coils the car runs on, determine the severity of the car’s symptoms.

  • Symptoms of ignition coil failure may include a decline in fuel economy, change in exhaust, backfiring issues, misfiring issues, difficulty starting and issues with stalling. There are several different ways to diagnose an ignition coil failure issue mechanically, including checking the wires connecting to the spark plugs. If you test these wires and find that there is no power reaching the spark plugs, then this means that energy is not properly being converted and transferred by the ignition coil between the battery and the spark plugs. This is the most common way to diagnose an ignition coil failure.

DIY Fuel Injector Cleaning Cleaning Fuel Injectors : Dirty Fuel Injectors : Clogged Fuel Injectors

  • Although not complicated the cleaning of clogged fuel injectors, dirty fuel injectors or fuel injection systems has to be done properly. Understand the possible consequences and know the correct procedures before you pour fuel injector cleaner or engine cleaning additives in your fuel tank. Not knowing what the product can and will do can have disastrous consequences. Theses cleaners can not differentiate between fuel injector, fuel rail, fuel line, fuel filter, fuel pump and fuel tank, and will have a cleaning affect on all the components it touches, thereby sending all the removed debris and contaminates from components other than the fuel injectors directly to the fuel injectors. This can cause the fuel injector filter baskets to become clogged. The minimum you can do before you use any in-tank cleaner on an older vehicle or a vehicle with suspected fuel related problems, is to ensure that you install a new fuel filter before you pour any cleaner in the fuel tank.
  • Take into consideration that some in tank fuel injector cleaners and the overuse of in tank fuel injection cleaning can and eventually will damage expensive catalytic convertors.
  • If the vehicle was not operated for an extended period of time we suggest that all fuel related components be cleaned internally before cleaning addetives are poured into the fuel tank.
  • Never clean your clogged fuel injectors with carburetor cleaner because the carburetor cleaner can and will damage filter baskets and other sensitive parts.
  • Never try and clean your dirty fuel injectors or clogged fuel injectors by blowing high pressure compressed air or cleaners such as brake cleaner etc. directly into the fuel injectors because it will cause damage to the filter baskets and cause debris to get stuck between the pintle valve and housing, causing the pintle valve to become stuck.
  • Always handle your fuel injectors with the utmost care and never drop your fuel injector because it can cause internal damage, damage to the pintel caps  and on some injectors it can even cause the pintle valve tips to get damaged or break off.
  • Never re-install your cleaned fuel injectors with old, hard and cracked o-rings and make sure there is a proper seal between the fuel injector and the fuel rail as well as between the fuel injector and the intake manifold. If you do not have o-ring grease, use clean engine oil or Vaseline on your fuel injector o-rings.
  • Use a vacuum cleaner to remove any dirt from the area where the fuel injectors are installed at the base of the intake manifold or cylinder head.

  • To prevent damage to the engine control module, always use fuel injectors with the same resistance than that specified for the use with your engine’s control module.

  • If you are going to store your fuel injectors for any length of time it is good practice to make sure that your fuel injectors are clean, well lubricated and stored in a sealed plastic bag. Try to remove as much air from the bag as possible
  • 99.9 % of DIY fuel injector cleaning projects does not yield good results because of a lack of the proper equipment. Dirty fuel injectors need to be pulsed at various speeds to properly clean the inside. The ability to back flush the injector is also important because of the dirt removal effect back flushing has. Proper cleaning fluids combined with Ultrasonic pulsation is just about the only way to guarantee clean fuel injector internals.
  • Most of those who attempt to clean their own dirty fuel injectors spend more money and time on the cleaning process than what it would have cost to sent the clogged fuel injectors or dirty fuel injectors off and have it professionally cleaned. In the end that is what most do after they tried to clean there own dirty fuel injectors …. send it off and have them professionally cleaned.
  • Always remember that what you loosen in the tank or in the fuel lines has only one way to go if the fuel filter is not in good shape …… straight into the injectors. Any thing after the fuel filter will automatically be sent to the fuel injectors causing either partially clogged or completely clogged fuel injectors.

Visual Inspection and actual flow testing is the only sure way to confirm that your fuel injectors are truly clean, anything ells is only guess work.

Are you really willing to compromise the reliability of your vehicle on guess work?