04-10-2015, 01:23 PM
you can buy rolling coal kits - these specifically pump in excess fuel - some of them are switched so you could disable them for the mot.
here is a you tube link that should give you some idea of the possibilities
https://www.youtube.com/watch?v=22b27P9Pk9E
here is a you tube link that should give you some idea of the possibilities
https://www.youtube.com/watch?v=22b27P9Pk9E