Diesel Pump Repairs

Over the last few years, there have been considerable advancements in diesel fuel injection systems. Unfortunately, this adds stress to the diesel pumps’ internal parts due to the high fuel pressures they have to produce.

An area of uncertainty is trying to diagnose engine running faults by knowing the condition of the high-pressure diesel pump. We can test high-pressure fuel pumps helping to determine their condition and whether it could be a cause. Modern fuel pumps are tested and repaired using our state-of-the-art technology at our dedicated workshop in Shropshire.

With over four decades of experience in the UK’s diesel fuel injection industry, we can also repair older diesel fuel pumps, which is quickly becoming a rare service. For leading diesel fuel pump testing and repair services, trust the experts at United to get you back on the road.

Diesel Pump Repair | United

Common Rail Pump Repair

The common rail diesel pump has seen incredible development within diesel engine technology, increasing the demand for diesel pump repair services – and the need for testing systems and equipment to be more sophisticated. The repair process for a modern diesel pump needs the skill of an experienced engineer and high-specification equipment to test and repair the component effectively. But our service doesn’t only stem to newer common rail pumps. With over 4 decades of experience, we can repair older diesel fuel pumps using high-quality parts and back-to-basics processes. Sometimes technology isn’t always the best (or only) option for testing! But when it is needed, we use the latest state-of-the-art technology to inspect, repair and test all types of diesel pumps. Find out more about our common rail diesel pump repair and testing services by contacting the team in Shropshire today.

This service will help you…

  • Confirm possible faults – our speedy diesel fuel pump testing service helps reduce vehicle downtime.
  • Identify and prevent additional issues in the fuel system, such as metal contamination caused by pump failure, leading to costly repairs.
  • Reduce overall costs as our fault identification and repair service is more economical than just fitting a replacement unit.
  • Rejuvenate classic fuel injection systems.

Benefits of Diesel Fuel Pump Repair

Founded over a century ago, we’re one of the leading diesel fuel pump specialists in the UK and have the knowledge and expertise to repair all types of diesel pumps. Repairing the diesel pump can actually fix more than just the initial issue you spot. These fixes can help with easier starting, a drop in MPG (Miles Per Gallon) and a boost in the vehicle’s efficiency. By repairing the pump and not replacing it, vehicles will be back in action sooner, reducing downtime – this is a massive benefit if your issue relates to an engine that is used operationally. Book your car’s diesel pump repair today

Common Issues of A Faulty Diesel Fuel Pump

There are a number of indications of a potential faulty fuel pump. Many customers will experience the same fault and may already know the cause but, in some instances, you’ll need a specialist who can investigate the fault for you.

Did you know – modern fuel management systems will inject fuel up to 7 times in one firing cycle? This is why fuel pressures are so high – injectors must react quickly!

At our dedicated workshop in Shropshire, we use the latest technology that allows us to test fuel injectors and pumps. Then we’ll inform you of the test results and advise you on what would be the best course of action to take. Should the car’s fuel pump be unrepairable, we can offer exchange units or the supply of new units.

From cars and commercial fleet vehicles to agriculture/plant and marine; we’ll inspect your component to discover the issue and once diagnosed, we’ll offer a repair, exchange or a new component. What makes us different is if we know we can repair your fuel pump, this is always the first option we’ll give you.

Faulty Diesel Pump | United
Diesel Pump Troubleshooting | United

Common Diesel Pump Faults & Repairs

If you’re looking for some troubleshoot help, check out our FAQ page here. To help you along the way, we also have a series of guides on different aspects of completing your own troubleshooting and identifying faults. Some of the most common problems you may have experienced are:


  • Overheating/note of the temperature gauge
  • Reduced power when the vehicle is carrying weight
  • Increased use of fuel and a decrease in MPG
  • Non-start or difficult starting of the engine
  • Diesel knock or pinking coming from the engine
  • Smoke being emitted from the exhaust

What our customers say...

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Kartmanz W
Kartmanz W
17:42 18 May 22
Excellent family run business, very helpful and knowledgeable, highly recommended if you have any problems with your injectors, fuel pumps, dpf or even turbos now.
Lee Bowker
Lee Bowker
11:43 06 Apr 22
amazing company very helpful great work ethic and customer service 100%sent details of installation of injectors which is a great help would highly recommend them
Cameron Cumming
Cameron Cumming
12:46 23 Feb 22
'While you wait' service on a DPF clean, really professional and knowledgeable team. Excellent service.
See All Reviews

Specialist services

At our dedicated workshop in Shrewsbury, we provide professional, efficient and expert testing and restoration services. We’re known for our fast and efficient service but we never sacrifice the quality of our service.

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Our Services

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Commercial Diesel Injector Repair | United

Diesel Injector Repair Service

Experiencing an issue with your vehicle and not seeing an answer with your diagnosis? With our diesel injector repair service, we can test your injectors using the latest technology. We offer a specialist repair service for all types of engines including automotive, commercial, agriculture, plant and marine.

Diesel Pump Repair | United

Diesel Pump Repair Service

Diesel pumps are the key to a diesel vehicle’s performance. Following advancements in mechanics, the sophistication and complexity of diesel fuel injection pumps has naturally advanced. Producing fuel pressure and volume, diesel pumps are the catalyst to controlling electrically controlled injectors and fuel delivery, so repair is crucial to performance.

Turbocharger Repair | United

Turbocharger Repair Service

Not all turbochargers need to be replaced when they fail – with the right inspection process, many turbochargers can be repaired back to top performance. Using industry standard processes and technology, we test, repair, and replace turbochargers, completing rigorous inspection, cleaning, and testing.

DPF Cleaning Service | United

DPF/CAT/SCR Cleaning

Utilising our market leading technology, we can provide professional cleaning, regeneration, and repair of all exhaust filters for automotives, commercial, plant and agricultural vehicles. Regular cleaning of exhaust filters improves engine performance and reduce future damage and costs.

Petrol Fuel Injectors Repairs | United

Petrol Injector Repair Service

In addition to diesel injectors, we also have extensive experience in cleaning and flow testing petrol fuel injectors. Our cleaning and repair service is just a fraction of the cost of a new fuel injector, restoring your component. This is available for vehicles used in a wide range of industries, including automotive, motorcycles and marine.

Car Performance Upgrades | United

Performance Upgrades

Want to increase the drivability and performance of your vehicle? We can accelerate your vehicle into overdrive! We specialise in modifying, calibrating, and supplying high-performance diesel and petrol injection components that are designed to meet the varied demands of the racing & performance markets.

Cat HEUI Injector Repairs | United Performance

Cat HEUI Injector Repairs

Don’t let failing Cat HEUI injectors sideline your vehicle. United Performance offers a fast, cost-effective solution to maximise the performance of your vehicle and ensure its output is optimised.

DAF Common Rail Injector Repair | United Performance

DAF Common Rail Injector Repair

We’re here to get your DAF truck running like new again with our advanced DAF Common Rail Injector Repair Service. We’re committed to using the latest technology, to guarantee OE quality repairs.

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