Yes. Diesel Lab services many diesel fuel injection systems across different brands.  Services include:

• Common rail systems
• Injector testing & repair
• Diesel fuel pump diagnostics, repair/reconditioning and testing
• Full system diagnostics on diesel vehicles

Injector testing checks:

• Spray pattern
• Leak-off (return flow)
• Pressure and delivery
• Electrical response

Accurate testing ensures faults are identified before replacing expensive components unnecessarily.

No, we do not. Diesel Lab specialises in diesel fuel injection system repairs only.

Customers nationwide are welcome to send components to Diesel Lab for testing and repair. To safeguard items during transit, we recommend using secure, protective packaging. Please note that courier, insurance, and any risk of loss or theft in transit remain the sole responsibility of the customer. Once received, Diesel Lab will handle all components with the utmost care and professionalism.

It is essential that customers’ contact details are included in the package.

Injector testing is a mandatory part of our process, and payment is required at the time of booking. This ensures accurate results, assists us in quoting correctly, and supports efficient turnaround.

Yes, a “strip and quote” fee is payable as per our standard labour fees.  Should the quotation be rejected, the diesel pump will be returned to client, stripped.  Should you require the diesel pump to be reassemble, this may be requested and an additional fee will be payable.

Yes. We perform testing or diagnostics, whichever is applicable and provide a detailed quote before proceeding with any repairs.

Typical turnaround time on loose components repairs is 2–5 working days.

Turnaround time depends on the type of component, availability of parts and the testing and calibration requirements .

A standard repair and calibration on a diesel pump takes 1–3 days depending on the pump type and parts availability. Common rail pumps often take longer than mechanical rotary pumps.

All testing and diagnostic fees are payable upfront.

A 50% deposit payment is required on quotations in order to proceed with repairs.

Final payment for repairs must be paid before collection or dispatch.

Electronic Fund transfers must clear in our bank before goods will be released.

• EFT (Electronic Funds Transfer), however fund must clear in our bank account before goods will be released.
• Cash payments
• Debit and credit card payments

If additional faults are identified on a loose component or vehicle, you will be advised of such. Additional work will only be continued upon your official verbal or written authority.

We provide a warranty on injector repairs and parts, subject to correct installation and operating conditions. Warranty remains valid only if there is no contaminated fuel, dirt or water in the fuel system of the vehicle and if components have not been tampered with after repair.

Up to 12 months or 20,000 km (whichever comes first)

Overhauled diesel injection pumps: 3-month warranty on workmanship

Warranty does not cover:

• Damage caused by dirt or water contamination
• Damage caused by contaminated fuel
• Incorrect installation or setup
• Electrical faults or incorrect power supply
• Blocked fuel lines or filters
• Driver misuse or negligence

Contact Diesel Lab immediately. Early diagnosis often prevents further damage and allows faster resolution of the issue.

Repaired components are generally not returnable, but they are covered under warranty for faults related to workmanship or parts.

No.  No electrical parts e.g. solenoid will be accepted for return.

Other component parts supplied e.g. washers and washers kits are generally not returnable.

Common symptoms include:

• Loss of power
• Increased fuel consumption
• Rough idling or misfires
• Black or excessive exhaust smoke
• Hard starting or no start

These issues occur because poor spray patterns or leaks affect combustion efficiency.

You can—but you shouldn’t. Driving with a faulty injector can lead to:

• Engine damage
• Increased emissions
• Fuel system contamination
• Higher repair costs over time

Yes, some modern diesel systems require injector coding. Failure to do so can result in poor performance on the vehicle.

Most injectors can be:

• Reconditioned
• Rebuilt with new internal components
• Calibrated back to OEM specifications

However, severely worn or damaged injectors may need replacement.

Diesel injectors do not require regular servicing intervals like filters, but they should be tested if vehicle performance drops in order to identify faults.

The quality of fuel in the vehicle plays a major role in their lifespan of injectors.

The most common causes include:

• Poor fuel quality or contamination
• Internal wear and tear
• Carbon buildup and deposits
• Electrical faults (in common rail systems)
• Incorrect installation or lack of calibration

• Use high-quality diesel fuel
• Replace fuel filters regularly
• Avoid running the tank too low
• Service your vehicle on schedule

Good maintenance significantly improves injector reliability and performance.

Leak-off testing measures how much fuel an injector returns to the tank.
Excessive return flow is a key sign of internal wear or failure.

To ensure warranty validity:

• Clean the fuel tank and fuel lines
• Replace fuel filters with genuine parts
• Ensure proper torque and installation procedures
• Run diagnostics after installation
• In the case of Delphi injectors, make sure to follow the bleeding instructions before installation.

It varies by pump model and extent of damage. Mechanical pumps are generally less expensive to repair than common rail pumps due to electronic components and tighter tolerances.  We have to strip and/test the diesel pump in order to give an accurate estimate.

It’s not recommended. A failing pump can damage injectors, cause poor combustion, and in some cases lead to complete engine failure. It’s cheaper to repair early.

Maintenance tip: Always use clean, water-free diesel and replace fuel filters at the recommended interval.

Precision calibration resets the pump to deliver fuel at the exact pressure and timing specified by the manufacturer. Even a small deviation affects fuel economy, power, emissions, and engine life.

Most pumps can be repaired if caught early. We disassemble, clean, replace worn components, and recalibrate to factory specs. Replacement is usually only needed if the housing is cracked or internal damage is severe.

Service intervals vary by manufacturer, but generally every 100,000–150,000 km or if you notice performance issues. Regular fuel filter changes are the best preventative maintenance.

• Hard starting or no start
• Loss of power and poor acceleration
• Rough idling or engine misfiring
• Excessive black or white smoke from exhaust
• Increased fuel consumption
• Fuel leaks around the pump

No. Diesel Lab is not responsible for towing, labour, or additional vehicle-related costs associated with failures.

We recommend a full vehicle diagnostic test to be done. In some cases, injector failure is caused by underlying system issues that must be addressed to prevent repeat problems.