I have a 2010 Volvo C30 1.6 petrol which has started intermittently erratically revving from 500 to 3000 revs when stopping at lights and this can only be solved by switching the engine off and restarting. This also has caused the reduced engine power light to come on.
i have just had the starter pack (coil pack ), all spark plugs and leads replaced by the RAC all Bosch parts.
Does anyone have any suggestions or recommendations for these issues.
Thank you in advance