I just changed my plugs last weekend. You can do it without removing anything, but I opted to remove the coil pack for the extra room. I was changing the wires as well (car has 99k on it now) and there's only four bolts that hold the coil pack in place. Took me about three hours and I was going really slow. The car's just a daily driver and I'm on a budget, so I went with Duralast wires and Bosch platinum plus plugs (against everything I read on here, I'd already bought them anyhow). The car runs much smoother now and it seems like I don't have to step on the accelerator so much to get the thing moving.
I also checked my gas mileage this week. I gained around 3-4mpg after the tune-up (PCV valve also) so I'm pretty happy. This was under the same conditions driving back and forth to work with the A/C on. Fuel filter, tranny filter/fluid are going in at the next oil change in 1k miles.
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