With today’s technologically advanced vehicles, all engines are run by on board computers (ECU). When there is a fault these systems will usually display a warning light on the dashboard. This generally has to be interrogated using suitable diagnostics equipment by downloading the fault codes that may be stored in your computer. However, your ECU will not generally diagnose faulty or worn mechanical engine components, this will have to be carried out in addition to the information stored in the vehicles on board computer.

Please note: On some cars, the ECU will introduce a misfire/loss of power or poor throttle response to prevent the possibility of further engine damage & also to reduce harmful exhaust emissions.

2 - If your vehicles ECU has either no fault codes or none relevant to the symptoms, further manual diagnostic checking will be required subject to the hourly labour rate. This further investigation service may require either electrical diagnostic or manual. This could involve compression testing or the strip down of mechanical components in order to isolate the fault.