[Infographic] How Mechanics Can Fix Fuel Injection Systems

We see it in every car engine, and it can leave drivers in a major pickle if not working properly. Fuel is something any vehicle will need to keep itself going, and a car’s fuel injectors are easier to maintain than some might think. However, a faulty fuel injection system can do damage to other engine components over time, and can even leave drivers stranded. Sometimes these injectors can be fixed by a mechanic, but sometimes they’ll need a full replacement. Either way, a car’s fuel injector is needed to bring fuel to the engine, and any issues can spell trouble for both its efficiency and performance.

Those wanting to learn how to become a mechanic may notice certain signs and symptoms of a malfunctioning fuel injection system. These include problems starting the car, engine misfiring, reduced engine power, and bad fuel economy. Auto mechanic school students can troubleshoot by checking the engine control unit (ECU) for error codes, removing and testing the injectors, using fuel injector cleaner, or replacing the injectors outright if all else fails.

Want to know more about how fuel injection systems can be fixed by mechanics? Check out the infographic below.

How Mechanics Can Fix Fuel Injection Systems

Some components of a fuel injection system:

  • Fuel injector
  • Fuel pump
  • Engine ECU
  • Fuel pressure regulator
  • Throttle
  • Metering valve
  • Flow divider

Different types of fuel injection systems:

  • Multi-port fuel injection (MIF)
  • Throttle-body injection
  • Direct injection
  • Sequential fuel injection

What can cause a fuel injection system to malfunction?

  • Internal clogging
  • Dirty injectors
  • Mechanical part failure
  • Internal injector leakage
  • External leakage

What are signs that a fuel injection system could be failing?

  • Driving issues
  • Difficulty starting the car
  • Less fuel economy
  • Lost engine power
  • Misfiring engine
  • Check Engine light illuminated
  • Surging
  • Tailpipe smoke
  • Oil thinning
  • Vibrating/knocking engine
  • Rough idling

How can drivers prevent fuel injector failure?

  • Frequent servicing
  • Less aggressive driving
  • Inspection
  • Fuel system cleaner
  • Regular cleaning

What can a mechanic do to fix it?

  • Clean the injectors
  • Inspect engine bay
  • Test the injectors
  • Fuel injector cleaner
  • Clean individual lines
  • Check ECU
  • Replace O-rings
  • Replace the injectors










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