[Zeex]

pawn Код:

GetVehiclePos(playerid, x, y, z);
SetVehiclePos(playerid, x, y, z + 10.0); //This thing ^doesnt do anything at all (suppose to be a superjump for cars)

Those functions need vehicleid but you're passing playerid to them, that's why it doesn't work (or maybe you are vehicle?)

And read this tutorial > https://sampwiki.blast.hk/wiki/OnPlayerKeyStateChange