Common Rail Injector Testing

One of the most frequent problems with common rail injection vehicles is hard starting. This is caused by a high amount of fuel return from the injectors not allowing the vehicle to get enough fuel into the combustion chamber to ignite. In most cases when you take your vehicle to a repair shop to resolve this problem, they will advise you to replace all of your injectors. Chances are you only need to replace one or two of your injectors, most repair shops do not have the ability to test common rail injectors. At DFIS we have the latest test equipment built by Hartridge to test your injectors.

Some of the types of common rail injectors DFIS can test.

Cummins and Scania's XPI (Developed under joint venture)
Cummins CCR (Cummins pump with Bosch Injectors)
Daimler's CDI (and on Chrysler's Jeep vehicles simply as CRD)
Ford Motor Company's TDCi Duratorq and Powerstroke
General Motors Opel/Vauxhall CDTi (manufactured by Fiat and GM Daewoo) and DTi (Isuzu)
General Motors Daewoo/Chevrolet VCDi (licensed from VM Motori; also branded as Ecotec CDTi)
Mazda's CiTD (1.4 MZ-CD, 1.6 MZ-CD manufactured by Ford)
Mitsubishi's DI-D (recently developed 4N1 engine family uses next generation 200 MPa (2000 bar) injection system))
Nissan's and Renault's dCi
Volvo 2.4D and D5 engines (1.6D, 2.0D manufactured by Ford and PSA Peugeot Citroen)


Common Rail Facts
The common rail system prototype was developed in the late 1960s by Robert Huber of Switzerland and the technology further developed by Dr. Marco Ganser at the Swiss Federal Institute of Technology in Zurich, later of Ganser-Hydromag AG (est.1995) in Oberägeri. In the mid-1990s Dr. Shohei Itoh and Masahiko Miyaki of the Denso Corporation, a Japanese automotive parts manufacturer, developed the common rail fuel system for heavy duty vehicles and turned it into practical use on their ECD-U2 common-rail system mounted on the Hino Rising Ranger truck and sold for general use in 1995. Denso claims the first commercial high pressure common rail system in 1995. Modern common rail systems, whilst working on the same principle, are governed by an engine control unit (ECU) which opens each injector electronically rather than mechanically. This was extensively prototyped in the 1990s with collaboration between Magneti Marelli, Centro Ricerche Fiat and Elasis. After research and development by the Fiat Group the design was acquired by the German company Robert Bosch GmbH for completion of development and refinement for mass-production.

The common rail system accumulates high-pressure fuel in the common rail and injects the fuel into the engine cylinder with timing controlled by the engine ECU, allowing high-pressure injection independent from the engine speed. As a result, the common rail system can reduce harmful materials such as nitrogen oxides (NOx) and particulate matter (PM) in emissions and generates more engine power.