In a small mixing bowl, whisk the oil, lime juice, tequila, onions, garlic, jalapenos and cilantro. Season with more salt and pepper.
Place the ribs, meat side down, in a glass baking dish. Pour the marinade over the ribs, coating each side completely. Cover with plastic wrap and refrigerate overnight (at least 12 hours), turning every couple of hours.
Remove from the refrigerator and bring the ribs to room temperature.
Heat the grill on low. Place the ribs, meat side down, and grill them, turning and basting every 15 minutes. Cook for about 1 1/2 to 2 hours, or until the ribs are tender.
Remove from the grill and slice into individual ribs.