Cairns Diesel Service are the experts in

diesel fuel injector cleaning fuel doctor

which diesel injector cleaner is best?

Cairns Diesel Service have specialised in Diesel Fuel Injection for over 60 years with a team of qualified experts that have very extensive knowledge of Diesel Fuel Injection solutions. We perform repairs, overhauls and testing on a wide range of Injectors and Pumps.

We are the only Certified Bosch Workshop in FNQ and home to the latest Bosch and Hartridge diesel injector and pump test benches on the market. This allows us to perform advanced testing and even more efficient repairs. That said, we know a thing or two about cleaning them. We only recommend and supply the best.

Fuel Doctor – Australia’s Best Injector Cleaner and Fuel System Cleaner

Fuel Doctor is the leading injector cleaner and fuel system cleaner in Australia, delivering unmatched cleaning power. Originally developed in 1994 as an industrial fuel tank cleaner, it has a proven track record across various industries, including farms, construction sites, service stations, defence bases, and marinas.

Fuel Doctor isn’t just for large industrial tanks—it’s highly effective for all fuel systems, from mopeds to mining trucks and jet skis to super yachts. Its advanced formula ensures superior cleaning performance without relying on hydrocarbons, fillers, or carrier liquids like diesel, heating oil, kerosene, or turpentine.

More than just an injector cleaner, Fuel Doctor provides enhanced lubrication, reducing injector noise and helping fuel system components perform at their best.

Find Fuel Doctor in-store at Cairns Diesel Service or order online for fast delivery Australia-wide.

when to use diesel injector cleaner?

When to Consider Using Injector Cleaner:

    • Rough Idling: If your engine idles roughly or hesitates, it could be a sign of clogged injectors. 
    • Decreased Fuel Efficiency: If you’re noticing a significant drop in fuel economy, injectors could be contributing to the problem. 
    • Increased Exhaust Smoke: Excessive black smoke from the exhaust can indicate incomplete combustion, potentially caused by dirty injectors. 
    • Drop in Power: A noticeable loss of power or sluggish acceleration can also be a sign of injector issues

 

  • How to Use Injector Cleaner:

    • Add Before Refueling: Most diesel injector cleaners are designed to be added to the fuel tank before you fill it with diesel. 
    • Follow the Instructions: Always follow the instructions on the product label for the correct dosage and usage. 
    • Regular Maintenance: For routine maintenance, you can use a diesel injector cleaner every 4,800 to 10,000 kilometers. 
    • More Severe Cases: If you suspect a more serious injector issue, you might need to send them to us for a  diesel injector service: we test and ultrasonic clean for under $100. 

how can you tell if a diesel injector is bad

Cairns Diesel Service Bosch 815 Diesel Fuel Injection Test Bench

Engine Performance Issues

Rough Idling: A rough or uneven idle is a common early symptom, indicating that the injectors aren't delivering fuel evenly. Misfires: Engine misfires, especially noticeable when accelerating, can indicate that one or more injectors are failing to deliver the correct amount of fuel. Difficulty Starting: Cold starts or hard starting can be a sign that the injectors aren't spraying fuel effectively, or that the fuel system has a leak. Loss of Power: If your diesel engine feels sluggish or lacks power, especially when accelerating, it could be a sign that the injectors aren't delivering enough fuel. Engine Hesitation or Stumble: Hesitation or stumbling during acceleration can also be a sign of faulty injectors.
Inline Pump Repairs Cairns Diesel Service

Fuel-Related Issues

Increased Fuel Consumption: If your diesel engine is consuming more fuel than usual, it could be due to faulty injectors that are not delivering fuel efficiently. Fuel Smell: A strong smell of raw diesel, especially around the engine, can indicate a leak or a problem with the injectors.
Excessive Smoke: Black, white, or blue smoke from the exhaust can indicate that the injectors are not delivering the correct amount of fuel, leading to incomplete combustion. Dirty Emissions: If your vehicle fails an emissions test or you notice an increase in the smell of unburned fuel from your exhaust, it could be a sign of clogged or faulty injectors.

Other Indicators

Check Engine Light: A check engine light can sometimes indicate a problem with the fuel injection system, including faulty injectors. Engine Knocking: Inconsistent noises or distinct knocking in the engine can indicate fuel contamination and faulty diesel injectors. Leaking Injectors: Leaking injectors can be detected by inspecting the injectors for signs of wetness, smell, or smoke. If you suspect you have a problem with your diesel injectors, it's best to consult a qualified mechanic for a proper diagnosis and repair.

what is diesel injector knock?

Diesel injector knock, also known as diesel engine pinging or detonation, is a distinct metallic knocking sound originating from the engine’s combustion chamber, often caused by issues with fuel quality, injector timing, or combustion chamber conditions. 

Here’s a more detailed explanation:

  • What it sounds like:
    The sound is similar to a sharp tapping or rattling noise. 
  • What causes it:
    • Faulty fuel injectors: Worn, sticky, or otherwise malfunctioning injectors can lead to delayed or uneven fuel injection, causing the fuel to ignite prematurely or unevenly. 
    • Fuel quality issues: Contaminated or poor-quality fuel can negatively impact the combustion process, leading to knocking. 
    • Combustion chamber conditions: Issues like excessive carbon buildup or incorrect timing can also contribute to knocking. 
    • Other potential issues: Blocked fuel supply lines, a faulty high-pressure pump, or problems with pressure regulators or sensors can also cause knocking. 
  • Why it’s a problem:
    Diesel engine knocking can lead to rough running, reduced engine performance, and potentially damage to engine components. 
  • How to address it:
    • Inspect and test: Thoroughly check the fuel injectors for any issues and consider sending them in for professional testing. 
    • Address fuel quality: Ensure you’re using high-quality fuel and that the fuel system is free from contamination. 
    • Check for blockages: Ensure fuel supply lines and filters are clean and free from blockages. 
    • Professional diagnosis: If the knocking persists, seek professional diagnosis and repair from a qualified mechanic. 

what causes diesel injector knock?

Diesel injector knock, a loud knocking or pinging sound, typically arises from uneven or premature combustion caused by issues with fuel delivery, such as faulty injectors, poor fuel quality, or a clogged fuel system. 

Here’s a more detailed explanation:

  • Faulty Fuel Injectors:
    When injectors become clogged, dirty, or fail to operate correctly, they may deliver an uneven or insufficient fuel supply, leading to incomplete combustion and engine knocking. 
  • Fuel Quality and Contamination:
    Using poor-quality fuel or fuel contaminated with water or other debris can cause injector issues and lead to knocking. 
  • Clogged Fuel Filters or Supply Lines:
    A clogged fuel filter or blocked fuel supply lines can restrict fuel flow, leading to uneven fuel delivery and knocking. 
  • Timing Issues:
    Improperly timed fuel injectors can also cause knocking, as the fuel may be injected at the wrong time relative to the engine’s cycle. 
  • Excessive Carbon Buildup:
    Carbon deposits in the combustion chamber and on the injectors can lead to uneven combustion and knocking. 

Other Potential Causes:
Faulty high-pressure pump, faulty pressure regulator or sensor, or issues with cam and crank sensors can also contribute to diesel knock.

Cairns Diesel Service Bosch 815 Diesel Fuel Injection Test Bench

diesel fuel injection testing

We can test your Diesel Fuel Injectors and Pump. Including those from all types of vehicles and machines; regular 4WD cars to large Earthmovers, Agricultural Equipment or Generators. Our workshop is equipped with the latest state of the art technology including our Bosch 815 and Hartridge AVM2 Test Benches. We are the proud authorized repair center for Bosch, Denso, Stanadyne, Zexel, Delphi and more.
Inline Pump Repairs Cairns Diesel Service

pump and injector repairs

We repair and supply parts for various fuel injectors and pumps. Our trained technicians perform diagnostics, repairs, rebuilds and testing to address issues including deposit build-up, contamination, and other factors that can cause failure over time.​

complete rebuild & overhaul

We can rebuild, repair and overhaul your Injectors and Pumps. We conduct an in-depth step by step remanufacture process that you can read more about on our exchange page. We are the only official repairer for Bosch and Denso fuel injectors in North Queensland. ​

Common Questions about Diesel injector cleaner

TD42 Repair and Test Cairns Diesel Service

At Cairns Diesel We offer repairs and complete overhaul rebuilds on Diesel Fuel Injectors and Pumps to customers all over Australia and NZ for over 60 years. Here are some of the question we will cover in the next article, if you need an answer urgently Simply text or Call Us on 0483 930 892 or book online and our expert service team will answer any questions about injector cleaning.

  • are diesel injector cleaners worth it/any good
  • can diesel injector cleaner cause problems
  • can diesel injector cleaner damage engine
  • can you drive a diesel with a bad injector
  • how can you tell if a diesel injector is bad
  • what happens when a diesel injector fails
  • how to tell which diesel injector is bad
  • diesel injector testing near me
  • diesel injector service near me
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  • diesel injector and pump service
  • high pressure fuel lines
  • how much diesel injector service cost($100 each)
  • how to unclog a diesel injector
  • diesel injector and turbo cleaner

brands we test & repair

Bosch, Cummins, Delphi, Zexel, Denso, Stanadyne, Continental VDO, John Deere, Detroit, CAT, MAN, Yanmar