[SyntaxQ]

You can do that by adding nitro/speed boost..
Here is an example code to help you out:

pawn Код:

// OnPlayerKeyStateChange
if(newkeys & KEY_FIRE) 
{
        if (IsPlayerInAnyVehicle(playerid))
        {
            new Float:vx, Float:vy, Float:vz;
            AddVehicleComponent(GetPlayerVehicleID(playerid), 1010); // Ignore this line if you don't want the nitro component to appear..
            GetVehicleVelocity(GetPlayerVehicleID(playerid), vx, vy, vz);
            SetVehicleVelocity(GetPlayerVehicleID(playerid) ,vx * 1.5,vy * 1.5 ,vz * 1.5);
        }
}