Fixed Code

#include <a_samp>

#define PRESSED(%0) \
        (((newkeys & (%0)) == (%0)) && ((oldkeys & (%0)) != (%0)))

new countpos[MAX_PLAYERS];
new Flame[MAX_PLAYERS][2];

forward Counter();

public OnFilterScriptInit()
{
    print("\n--------------------------------------");
    print(" Comandos Para Servers By Ronald");
    print("--------------------------------------\n");
    SetTimer("Counter",1000,1);
    return 1;
}

public OnFilterScriptExit()
{
    return 1;
}

public OnPlayerCommandText(playerid, cmdtext[])
{
    if(!strcmp("/pinchar",cmdtext,true)) {
        if(!IsPlayerInAnyVehicle(playerid)) {
            SendClientMessage(playerid,-1,"Debes estar en un vehiculo para poder usar este comando");
            return 1;
        }
        new panels,doors,lights,tires,vehicleid = GetPlayerVehicleID(playerid);
        GetVehicleDamageStatus(vehicleid, panels, doors, lights, tires);
        UpdateVehicleDamageStatus(vehicleid, panels, doors, lights,  0x5);
        return 1;
    }
    return 0;
}
//////////////

public OnPlayerConnect(playerid)
{
    countpos[playerid] = 0;
    return 1;
}

public Counter()
{
    for(new i; i < GetMaxPlayers(); i++)
    {
        if(IsPlayerConnected(i) && countpos[i] != 0)
        {
            countpos[i]++;
            if(countpos[i] == 4)
            {
                countpos[i] = 0;
                DestroyObject(Flame[i][0]);
                DestroyObject(Flame[i][1]);
            }
        }
    }
    return 1;
}

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
    if (PRESSED(KEY_FIRE))
    {
        new vehid = GetPlayerVehicleID(playerid);
        if(GetVehicleModel(vehid) == 522)
        {
            new Float:Velocity[3];
            GetVehicleVelocity(vehid, Velocity[0], Velocity[1], Velocity[2]);
            if(Velocity[0] <1.3  && Velocity[1] < 1.3 && Velocity[0] > -1.3 && Velocity[1] > -1.3)
            {
                SetVehicleVelocity(vehid, Velocity[0]*2, Velocity[1]*2, 0.0);
                if(countpos[playerid] == 0)
                {
                    Flame[playerid][0] = CreateObject(18693, 0.0, 0.0, 0.0, 0.0, 0, 0, 0);
                    Flame[playerid][1] = CreateObject(18693, 0.0, 0.0, 0.0, 0.0, 0, 0, 0);
                    AttachObjectToVehicle(Flame[playerid][0], vehid, 0.194999, 0.439999, 0.044999, 86.429962, 0.000000, 0.000000);
                    AttachObjectToVehicle(Flame[playerid][1], vehid, -0.204999, 0.439999, 0.044999, 86.429962, 0.000000, 0.000000);
                    countpos[playerid] = 1;
                }
            }
        }
    }
}

public OnPlayerDisconnect(playerid, reason)
{
    if(countpos[playerid] != 0)
    {
        countpos[playerid] = 0;
        DestroyObject(Flame[playerid][0]);
        DestroyObject(Flame[playerid][1]);
    }
    return 1;
}