hi guys sorry to bother you but i have a slight problem ,,
i swapped my mk2 1800 big block gti for a mk3 2.0gti
it was running ok but not 100%
slightly lumpy and wont rev past 5k <safe mode>
i also notice it uses loads of fuel like 10 mpg or less
reduced power by 30%
fault code g40 <suggest...