Fired up wife's V6 Buick and it shook running on three cylinders. Rodents had chewed the injector wires completely off on the rear bank. Googled and found modern wires are coated with a soy based plastic so yummy to critters. Was told to put dryer sheets like Bounce around under the hood. So far, so good. Never happened till I overfed the cat and she got fat and lazy.