Guys, Apart from misfiring, are there any other symptoms which might indicate that the coil packs need to be changed? For instance if the car feels like its lost a bit of power, and feels a bit sluggish, could that be an indicator of old and worn coil packs. The car is a BF XR6T which has just hit 200K, and I'm noticing that its feels a bit sluggish both off boost, and on boost. Seems like more effort is required to get moving rapidly... Have changed plugs, changed petrol filter, and regularly lube the boost solenoid, and boost does peak at around 5psi. Am I wasting my time and money by changing the coil packs if there is no misfiring? Could it even be a partially blocked cat? Any input is appreciated.