How to Repair a Car’s Fuel Injector

The function of the fuel injector is to mix the fuel in the car’s engine with air thus allowing the engine to run in a more smoothly manner at high and low temperatures. However the fuel injector and the fuel pump can both get blocked causing malfunction. Luckily there are some easy techniques that can be used for fixing a fuel injector before a new fuel injector can be purchased by the car owner.

Follow the simple and easy directions:

Things Needed

  • Static output pressure gauge Hammer Metal rod extension


Cars Fuel Injector

Step 1:

First determine whether the problem is caused by the fuel pump or fuel injector. In case the fuel pump is not running completely or is running slow, then the power supply has to be checked. The emitted from the pump has to be measured by attaching a static output pressure gauge to the fuel rail. The pressure reading has to be checked for knowing if the static output pressure gauge is emitting the pressure that is recommended by the fuel pump manual.

Step 2:

The fuel injector filter should be checked because these filters often get blocked. The blocked filters can be replaced at a very low cost rather than replacing the whole injector. Blocked fuel injectors and fuel injector filters are the very frequent problems that cause the fuel injector to work improperly.

Step 3:

The tip of a thin metal rod has to be placed on the malfunctioning fuel injector.

Step 4:

Use a hammer for lightly tapping the other end of the metal rod. Make sure that you tap on the fuel injector while the engine is start and running. Tap slightly harder if the injector still not working.

Step 5:

You would have to consider having a replacement if the fuel injector fails to work because it is possibly shot.

Additional Information

If a fuel injector has totally failed electrically or a problem is present in the control system, then no amount of cleaners will be able to solve the problem. Some basic checks would be required to confirm if the injector is operating properly.

Tips and Precautions

  • Safety precautions must be taken because the fuel injectors are potential eye and fire hazards. Safety gobbles must be worn and a fire extinguisher must be present nearby.
  • The fuel injector must not be tapped so hard that it gets punctured.

Further Readings: