Diesel Problems

Modern diesel engines suffer with a variety of problems and here at Wiseman Motor Services we have all the right equipment and training to obtain a solution for you.

Diesel Particulate Filter (DPF)Component Failure
Most commonly, we see problems with Diesel Particulate filters (DPF).

In order to keep diesel emissions low manufactures use a Diesel Particulate Filter, this filter collects the soot particles that are passed through the exhaust system following combustion. These particles contribute to global warming and are carcinogenic.

The particles are a result of incomplete or poor combustion of the diesel fuel, this can be caused by low quality fuels, incorrect oil usage and poor condition of the engine.

The soot is collected in a filter and the exhaust gas is emitted from the exhaust system tailpipe. When the soot quantity reaches a measured amount the engine management system will operate a regeneration process to burn off the collected soot particles.

This processs is achieved by passive or active regeneration. It involves raising the temperature of the DPF to around 700 °c. The temperature increase is enabled by changes to the timing of the engine or the addition of a chemical agent. The engine management system controls these procedures and the driver will not normally be aware that regeneration is taking place.

The causes of particulate filter blocking can be reduced by using a good quality fuel, ensuring regular servicing, using the correct low ash oils and taking the car for a good run now and again. If regeneration does not take place then eventualy the engine warning light will come on and a visit to Wiseman Motor Services may be needed.

If your car will not start, fails the MOT emission test or does not sound or run correctly, it may have a failed component.

  • Fuel injector
  • High pressure fuel pump
  • Low pressure fuel pump
  • Fuel pressure regulator
  • Blocked fuel filter
  • Wiseman Motor Services have all the right tools and equipment to test and accurately diagnose the fault on your car. A documented diagnostic path will be followed and customers are given regular updates on progress throughout the process.

Some components cannot be tested on site and we have secured a network of companies that specialise in the testing and repair of items such as injectors and fuel pumps that require removing from the car and bench testing on specific test equipment.

Diesel Issues? Drop us a line

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