Richards Bros Ltd

Petrol and Diesel Fuel Injection Specialists

Rolling Road

We can rolling road test and tune your everyday road car or commercial van to full single seater race car.

Vehicle Diagnostics

We are fully equipped with the very latest diagnostic equipment, which allows us to interrogate your vehicles engine management system.

Diesel Workshop

Approved by Bosch, Delphi, Denso and Stanadyne we can cover work required on any diesel pump or injector.


As an Evolution Chips agent we specialise in diesel and petrol performance chips, or remapping via OBD port.

Diesel Spares

We can supply diesel injection parts from the leading system manufacturer’s, such as Bosch, Delphi, Denso, Continental, Stanadyne and Pierburg.

Welcome to Richards Bros

Richards Bros are Cornwall’s leading Petrol and Diesel Fuel Injection Specialists. Trusted by Main Franchise Dealers and the Motor Trade we specialise in Engine Management fault diagnostics and repair. Our Factory trained technicians have years experience along with some of the most up to date test equipment available, giving us an unprecedented level for vehicle diagnostics.

We have a dedicated Diesel Injection workshop specialising in the testing, repair, servicing and reconditioning of diesel fuel injection pumps and injectors including common rail systems fitted to all the latest generation diesel vehicles.

Our Rolling Road is one of the most advanced systems in Europe. The extreme accuracy of this machine allows us to carry out pinpoint diagnostics as well as carburettor tuning and remapping of fuel injection systems for road and competition.

We also carry a wide range of fuel injection parts for all makes and models at competitive prices for local collection or mail order delivery.

If you are unable to find what you are looking for call and speak to our staff for further assistance.

Some of our Services


Vehicle Diagnostics

Diagnostic fault finding for engine management, air bag, EPS, ABS, vehicle stability and other vehicle systems.


Diesel Fuel Injection

Diesel fuel injection pump and injector repairs, servicing and testing for traditional fuel systems and the latest common rail systems from Bosch, Delphi, Denso, Continental and Stanadyne.


Rolling Road

Ecu mapping, carburettor jetting, vehicle diagnostics, performance power runs, speedo calibration checks.


Fuel Injection Spares

Diesel injectors and fuel pumps, pump and injector spares, fuel filters air mass meters, EGR valves, engine management sensors, petrol fuel pumps and lots more.


ECU Remapping / Chipping

Remapping and chipping of diesel and petrol engine management systems from Evolution Chips.

Contact us today for a Free Quote