JAC Auto Services in Hamilton delivers expert diesel mechanic care for reliable performance and lower repair costs
Keeping modern diesel engines performing at their best takes the right expertise. If injectors, filters, or tuning are neglected, your vehicle can suffer from reduced power, higher fuel use, and increased emissions.
At JAC Auto Services, our skilled in-house team provides professional diesel injector testing, DPF servicing, and precision ECU tuning—giving you better performance, improved efficiency, and reliable operation you can count on. We’ll help your diesel engine run cleaner, stronger, and longer.
Get in touch today to unlock the full potential of your diesel vehicle.
Comprehensive diesel injector servicing, repairs, and sales
The heart of your diesel vehicle or machinery is its fuel injection system. If you’re noticing rough running, hard starting, or poor fuel economy, faulty injectors are often the cause. Our experienced team supplies, tests, services, and fits both common-rail and pintle injectors, ensuring optimal fuel atomisation and combustion for better engine performance.
Our diesel injection services are carried out in-house by two qualified technicians, supported by a dedicated team of four. We offer:
- Accurate testing of spray patterns, flow rates, and leakage
- Prompt diagnosis to prevent more serious engine issues
- Professional calibration, cleaning, and replacement of worn parts
- Access to high-quality replacement injectors and expert installation
These services deliver smoother starting and running in all conditions, improved fuel economy, longer injector life, and reduced risk of costly breakdowns or downtime. Whether you're maintaining a personal vehicle or managing diesel-powered machinery, JAC Auto Services helps keep your engine running reliably and efficiently.
Get more power, reliability, and fuel savings with a diesel mechanic who truly understands your engine
- Expert diesel fuel injection service and repair for reliable, efficient engines
- DPF servicing, ECU tuning, and turbo charger repairs to maximise performance and lower emissions
- Our skilled diesel mechanics keep light diesel machinery and commercial vehicles running at their best
JAC Auto Services for all your diesel servicing and repairs - located in Hamilton and serves the Waikato region
DPF servicing, repairs, and sales for emission compliance
Modern diesel engines face stricter environmental standards, and blocked diesel particulate filters (DPFs) are a common headache. Our dpf servicing, repairs and sales can solve persistent DPF issues, ensuring your diesel engine runs clean and efficiently. We specialise in DPF cleaning, repairs, and even sales if a replacement is needed.
What does this mean for you?
- Improved fuel economy by allowing your engine to breathe freely
- Reduced emissions for compliance with legal requirements
- Lower risk of performance loss due to clogged filters
- Reliable operation, whether you’re commuting, delivering, or operating machinery
When you choose JAC Auto Services for DPF care, you get the assurance of knowing your engine remains both efficient and environmentally friendly.
Engine ECU tuning to unlock more power and performance
If you’re looking for increased power, better torque, quicker throttle response, or even improved fuel efficiency, our engine ecu tuning services are designed for you. The engine's control unit (ECU) is the "brain" of your vehicle, and our staff can safely adjust its parameters using specialist software and tools.
Here are the advantages:
- Personalised performance to match your driving style or business needs
- The ability to remove speed or rev limiters (where legal and safe to do so)
- Maximised potential for any performance upgrades
- Enhanced driving satisfaction while maintaining reliability
With JAC Auto Services, ECU tuning is done with a careful approach, ensuring your engine remains reliable while reaching its best potential.
Expert servicing for light diesel vehicles and small machinery
From tipper trucks and mini diggers to scissor lifts, forklifts, and portable generators, we specialise in servicing and repairing light diesel vehicles and small diesel-powered machinery. These assets are vital to your business—our team ensures they stay reliable, safe, and ready to perform when you need them most.
By working with us, you benefit from:
- Reduced downtime with fast, accurate repairs and scheduled maintenance
- Specialist expertise in diesel engines and equipment up to 5 tonnes
- Fewer unexpected breakdowns that could delay your work
- Longer equipment lifespan and better long-term cost efficiency
- Confidence that every machine or vehicle performs as it should
Let us focus on keeping your fleet and equipment running at their best—so you can focus on getting the job done without disruption.
Complete turbo charger servicing, repairs, and sales for long-term performance
Turbochargers are vital for modern diesel engines, delivering both power and efficiency. Our turbo charger servicing and repair and sales ensure your turbo is working how it should, detecting early signs of wear or failure.
This service gives you:
- Maintained performance with steady boost and response
- Extended component life, lowering future repair bills
- Reduced risk of related engine damage
- Great value from an efficient and powerful engine
Let our skilled technicians keep your diesel engine’s turbo in prime condition, so you enjoy every drive or job with confidence
Expert diesel servicing for lasting performance
We’re dedicated to keeping your diesel engine running clean, efficient, and reliable—whether you need DPF cleaning, ECU tuning, or injector repairs. While you’re here, we can also handle your Warrant of Fitness, auto battery replacement, or even motorhome mechanical repair and servicing, making it easy to stay on top of everything in one convenient visit.
Let us help your diesel engine run cleaner, stronger, and longer. Contact us today to book your service or learn more about how we can support your diesel performance.