Hi everyone I'm new here, I recently purchased an xj8 project, 1999 xj8 3.2 with a running fault. However, I've scanned the vehicle, it had coil faults, lambda faults, knock sensor faults, all of which I replaced one by one. So now I have no codes but still rough running. Which makes me think it's a mechanical error. Does this sound like a worn chain to you guys? Paul.