[SuperViper]

If I understand you correctly, you should set a 1 second timer which repeats 35 times to set the vehicle's health to 250 (fire) and after the 35th repetition, it explodes. An example:

pawn Код:

forward public VehicleFireExplode(vehicleID, burnTime);

public VehicleFireExplode(vehicleID, burnTime)
{
    if(burnTime)
    {
        SetVehicleHealth(vehicleID, 250);
        SetTimerEx("VehicleFireExplode", 1000, 0, "ii", vehicleID, burnTime - 1);
    }
    else
    {
        new Float: vehiclesPosition[3];
        GetVehiclePos(vehicleID, vehiclesPosition[0], vehiclesPosition[1], vehiclesPosition[2]);
        CreateExplosion(vehiclesPosition[0], vehiclesPosition[1], vehiclesPosition[2], 6, 10);
    }

    return 1;
}

SetTimerEx("VehicleFireExplode", 1000, 0, "ii", GetPlayerVehicleID(playerid), 35);