Gasoline Direct Injection(GDI) engines unfortunately suffer from a symptom known as carbon build-up which in simple-terms affects how the engine breathes, reducing the amount of air available to the combustion chamber. Common symptoms include, loss of power, increase in fuel consumption, intermittent misfires, rough idle and loss of compression.
The only truly effective way of cleaning carbon deposits from the intake tract and valves is by a procedure known as walnut-blasting. This involves removing the intake manifold and using a mixture of compressed air and walnut shells to gently but effectively remove years of carbon deposits from your intake.
Benefits from this procedure include an increase in fuel economy, increase in performance (tests have shown up to 20HP in some cases!) and a smoother running engine. Get in touch for a indictive quote to get your vehicle breathing as it was when it was new.