Asnu Fuel Injector Testing

ASNU Petrol Injector Testing

At Ecotune, we test, service, clean and provide a report on your Petrol Injectors, using our Asnu GDI Testing Machine.

ASNU is a well-known name in the field of fuel injector diagnostics and servicing. They offer a comprehensive system for testing and servicing petrol injectors, which includes:

Injector Diagnostics: ASNU’s system allows for detailed examination of injectors’ performance. This includes checking fuel distribution, droplet formation, atomisation, and delivery.

Testing Equipment: The ASNU Classic GDI system operates injectors at a lower, safer fuel pressure (up to 10 bar) to safely examine spray patterns and identify any discrepancies.

Servicing: ASNU machines can service various types of injectors, including GDI (Gasoline Direct Injection) and Piezo injectors. This servicing can address issues like poor fuel economy, misfiring, and knocking.

Here are some key points: 

Visual Inspection: Check for any visible damage or wear on the injectors.

Flow Testing: Measure the amount of fuel each injector delivers to ensure they are all providing the correct amount.

Spray Pattern Testing: Examine the spray pattern to ensure it is even and consistent, which is vital for proper combustion.

Electrical Testing: Check the electrical resistance of the injectors to ensure they are within the manufacturer’s specifications.

Ultrasonic Cleaning: Use ultrasonic cleaning to remove any deposits or blockages within the injectors, which can improve performance and fuel efficiency.

An example of a successful before and after can be seen below, please note - not all injectors will be successful during testing and cleaning.

Benefits of Regular Injector Testing:

Regular injector testing is a smart preventative measure that helps keep your engine running at its best. Here are the key benefits:

• Improved Fuel Efficiency
  Ensures the engine receives the correct amount of fuel, preventing over-fuelling and reducing unnecessary fuel consumption.

• Enhanced Engine Performance
  Promotes smoother throttle response, better acceleration and consistent power delivery by maintaining balanced fuel flow.

• Reduced Harmful Emissions
  Prevents incomplete combustion, helping to lower levels of carbon monoxide (CO), hydrocarbons (HC) and nitrogen oxides (NOx).

• Cost Savings on Repairs
  Early detection of injector issues can prevent damage to related components such as spark plugs, lambda sensors and catalytic converters – saving you money on major repairs.

• Increased Reliability and Longevity
  A clean, efficient fuel system reduces engine strain, improving overall reliability and extending the lifespan of both injectors and the engine itself.

• Better MOT Readiness
  Vehicles with well-maintained injectors are far more likely to pass emissions-related checks during MOT inspections.

Common Symptoms of Failing Fuel Injectors:

Faulty or clogged injectors can seriously impact your engine’s performance, fuel economy and drivability. Below are the most common warning signs to watch out for:

• Engine Misfires
  Dirty or clogged injectors can disrupt the fuel flow, leading to rough idling, hesitation during acceleration or inconsistent power delivery. Persistent misfires can eventually damage engine components.

• Illuminated Check Engine Light
  When the ECU detects irregular fuel delivery, it may trigger the check engine light. Fault codes related to misfires, lean/rich conditions or injector circuit faults may be logged.

• Poor Fuel Economy
  Leaking or inefficient injectors can cause the engine to burn more fuel, reducing miles per gallon and increasing your fuel costs over time.

• Excessive Engine Vibrations
  If cylinders aren’t firing properly due to injector issues, the engine may shake or vibrate – especially noticeable when idling or at low RPM.

• Strong Fuel Odour
  Leaking injectors can release unburnt fuel into the engine bay, resulting in a strong petrol smell. This is a fire risk and needs immediate attention.

• Hard Starting or Failure to Start
  Inconsistent fuel delivery during start-up can cause long cranks, sputtering or the engine failing to start – particularly after the vehicle has been parked for a while.

• Increased Exhaust Emissions
  Poor atomisation of fuel can lead to incomplete combustion, raising emissions and possibly causing your vehicle to fail MOT or emissions tests.

• Noticeable Loss of Power
  If injectors are not delivering enough fuel, the engine can feel sluggish – particularly under acceleration or when driving uphill.

Below is an image of some poor quality injector baskets: 

Regular maintenance and testing of your injectors can help prevent these issues and keep your engine running smoothly. If you notice any of these symptoms, it’s a good idea to have your injectors checked by a professional.

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