Diesel Injector Repairs

The importance of injector coding

With ever-increasing emissions legislations and a tightening of limits, vehicle manufacturers need a way to control the flow of fuel pressure and atomisation more accurately – this in turn will optimise the efficacy of the combustion process, controlling emissions within acceptable limits. Introducing – injector coding! Injector coding allows the ECU to compensate for manufacturing differences of the injectors making sure that the delivery quantities allow for smooth running. Failure to code in the injectors can cause a number of issues.

• Inefficient performance

  With some vehicles, it may be possible to drive away and not know any different. In reality, by not coding the injectors, it is unlikely that the vehicle will obtain its optimum performance, suffering with an increase in fuel consumption or black smoke.

• Non-start of vehicle

  In newer systems, if you do not code in the injectors, the vehicle can experience starting problems.

• Poor or lumpy running

  The ECU is still programmed with the original injector fuelling parameters and therefore can cause reduced performance.

• Diagnostics/re-coding errors (in some vehicles)

  Fitting “new” injectors without coding can result in the engine management light coming on, resulting in another visit to the garage!