Suppliers of diesel injectors and specialists in diesel fuel injector repairs, reconditioning and testing in Shrewsbury
Welcome to United Diesel Fuel Injection Services

We have two main areas within our company - United Diesel specializes in diesel fuel injector repairs, diesel pump & injector testing and high performance diesel injectors; United Tuning focuses on Viezu remapping and Viezu tuning for all types of vehicles


Just had my range rover sport tdv8 remapped by these guys I found them very helpfull from the initial phone call

I called in late on Friday afternoon to discus …
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- Carl Elson

Diesel Injector Repairs and Pump & Injector Testing

Diesel injector testing, diesel injector reconditioning and diesel pump testing in our workshop in Shrewsbury.

Send your diesel fuel injectors in for an honest, comprehensive fault finding test or if time is an issue contact us to supply you a new or reconditioned service exchange unit. If you are in the area testing of units can be done while you wait but please contact us first to arrange this.

Testing, reconditioning and supply of most diesel injection pumps and injectors.

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Diesel Injector Power Upgrades & Diesel Engine Tuning

Specialising in the supply and calibration of high performance diesel injectors for most diesel engines. Upgrades to diesel fuel injectors using high flow nozzles.

Using the 2 Stagemaster’s flow mapping ability we are able to map the flow characteristics of each high performance diesel injector ensuring that each injector is balanced to obtain the best possible performance.

Supply, fitting and calibration of high performance diesel injectors.

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Viezu ECU Remapping & Viezu Tuning

As a Viezu remapping approved agent we offer ECU remapping, car remapping and dyno tuning for all types of vehicles; Cars / Vans / HGVs / Tractors / Motorhomes.

Improve your driving experience by having your vehicle's engine remapped to be more responsive with a smoother and more powerful drive and increased MPG.

Having the full backing of Viezu remapping we are committed to offering you a professional product with all the necessary back up to ensure that your engine remapping experience will be rewarding and satisfying.

Read more about our Viezu ECU Vehicle Remapping and Tuning Services →

→ Recent News

Viezu wins Queen’s Award for Enterprise


Vehicle tuning specialist Viezu Technologies has won a prestigious Queen’s Award for Enterprise, the highest accolade rewarding excellence in UK business, in recognition of the outstanding innovation it has shown with its fuel-saving and emissions-cutting software, BlueOptimize, which has saved more than 200,000 tons of carbon emissions since its creation in 2011.

Developed in-house by Viezu over two years, BlueOptimize is the only vehicle tuning product focused solely on reducing fuel consumption and emissions. Viezu’s research and development[…]
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