Let's get something straight. The pendulum has no energy of its own. It is simply a tool people use to access their subconscious. YOU have the energy and the knowledge. All the props that psychics use- tarot cards, pendulums, crystals, crystal balls, tea leaves, etc- simply channel and define the psychic's energy. They are like the wands in Harry Potter.
Your gut should be in perfect harmony with your gut feelings. This takes concentration, being in a meditative state, locking out the chatter of your conscious mind. Same with any tool. Bring the focus back to you, then dissolve the focus and watch the pendulum like an outside observer. Then what is hidden deep in your mind has a chance to make it out. I would be happy to talk more about divining and things if you like. I have experience, mostly with tarot cards.