I need help. I have a 98 Dodge Caravan w/ 3.0L. It had a cylinder #5 misfire. I replaced plugs, wires, and cap. It did not help. I performed a compression test and cylinders 1&3 are 130 and cylinder #5 is at 55. What would cause this? Oil and coolant are fine. Someone told me a broken ring but it does not smoke or burn oil. Cold a bad valve cause this?