[MadeMan]

pawn Код:

if((newkeys & KEY_FIRE) && (GetPlayerState(playerid) == 2))
{
    SetVelocityForward(playerid, 1.0);
}

You must also add the SetVelocityForward function to your script

pawn Код:

SetVelocityForward(playerid, Float:multi)
{
    if (IsPlayerInAnyVehicle(playerid))
    {
        new Float:angle, Float:velox, Float:veloy;
        GetVehicleZAngle(GetPlayerVehicleID(playerid), angle);
        velox = multi * floatsin(-angle, degrees);
        veloy = multi * floatcos(-angle, degrees);
        SetVehicleVelocity(GetPlayerVehicleID(playerid), velox, veloy, 0.01);
    }
    return 1;
}