Originally Posted by pkxu123

The shop ordered a brand new Stillen extension harness for me as it was missing in the kit but ill have a look at it.

Got the Topgunz anti slip pulley in but it still made the exact same boost. So it's probably not the belt or pulley that's causing the boost issue?

Not too much of a mechanic head myself but I do still want to get this all sorted...

Anyway, regarding the tune, we're having an issue now where the maps will randomly disappear. The first time it happened, I brought it back to the shop and they flashed the maps on it again. I drove it home the same day and it disappeared again on the second start up.
The shop suspects it's the ecutek bluetooth dongle so they took it back to their shop to analyse it. They flashed the maps back on again yesterday and it hasn't disappeared yet.