Since 1995, Volkswagen, Audi, Seat and Skoda diesel vehicles have been equipped with variable geometry turbochargers. Other manufacturers followed suit and the majority of diesels manufactured today use variable vane technology including Transits, Sprinters, Crafters and similar sized vans. Whilst these units are far more efficient, they are prone to carbon build up on the variable vane mechanism, resulting in restricted movement and causing either under boost or over boost. This in turn causes the vehicle to be under powered and eventually ends up triggering the engine management light, generating fault codes and the vehicle going in to ‘limp mode’. To overcome this problem, the turbo had to be removed, stripped, cleaned or replaced at a considerable cost to the owner. However, there is now a very effective alternative called ‘Revive’ Revive is a safe water based, non toxic and non flammable fluid, using technology developed and used for the cleaning and maintenance of aviation jet engines, power station turbines, large marine diesel engines and now automotive engines. The fluid is sprayed into the vehicle’s intake system before the turbo inlet whilst the engine is running. As the Revive fluid passes through the combustion process, it locks on to built up oily/carbon deposits and breaks away a surface layer. These tiny carbonised particles are no bigger than the soot particles that the engine naturally generates, so Revive is perfectly safe to use on vehicles fitted with a Diesel Particulate Filter (DPF).