[ThePhenix]

The problem is that "Random" is invalid. It's case sensitive.

It's not the same "Random" than "random".

PHP код:

if(newkeys == KEY_FIRE)
    {
        if(GetPlayerState(playerid) == PLAYER_STATE_DRIVER)
        {
            new rndNum = random(1);//"R" Lowercase.
    switch(rndNum)
    {
        case 1: // Success
        {
                TogglePlayerControllable(playerid, 1);
                engineOn[vehicle] = 1;
                SendClientMessage(playerid, COLOR_RED, "The engine started normaly.");
               
        }
        case 0: // Fail
        {
                engineOn[vehicle] = 0;
                SendClientMessage(playerid, COLOR_RED, "The engine didn't start,try again.");
        }
    }
    }
    return 1;
}