Bought a Van aaken tuning box off E Bay. Was still wrapped inside box unused. I have had it in the car for about 2 month but my mpg has gone down not up. I do not drive like a GTI. My mpg went from 21.4 which would go up a bit on a run down to 21 regardless of how I seem to drive. I thought there were diffrent settings on these boxes but I cannot see any. Any ideas any one??
CraigP38
Active Member
Hi
How do you adjust the box as I have one fitted and cannot see any adjustment screws?
brutusmotorsport
Active Member
yeah and what make ya rr and how much is the box?
