My car won’t accelerate, i got the mod on the UPBGE discord server to fix it for me , but he seemed to scale my model down, So i scaled it back up (still worked) but it messed up with collisions, i adjusted the collision from triangle mesh to cube and now it’s OK but it just won’t accelerate anymore. Physics are working. I’ve tried setting it back to triangle mesh, , adjusted friction, and physics settings, etc.
Looks like he’s busy so he really can’t help me 
blend file:
snes_30.blend (2.2 MB)
which upbge version are you using?