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I would think a drop or 2 of oil inside the boot would help loosen it, and slightly twist before you pull up.
Last week at 85,000 miles I finally decided to change my plugs due to a cylinder 1 misfire code that came up. I ordered new plugs and a coil pack just in case. I went to remove the coilpack and just wiggled it slightly side to side and front back a few times with a little upward pressure and it slowly came off without any issues. Since I had bought the new coilpack though I decided to keep the old one as a spare and just use the new one.
Side note: 3 out of 4 of my plugs were loose. 2 were a 1/4 turn, one was 3 whole turns loose and had cylinder deposits covering the crush washer and allot of the threads. My car feels like a new machine!
Last week at 85,000 miles I finally decided to change my plugs due to a cylinder 1 misfire code that came up. I ordered new plugs and a coil pack just in case. I went to remove the coilpack and just wiggled it slightly side to side and front back a few times with a little upward pressure and it slowly came off without any issues. Since I had bought the new coilpack though I decided to keep the old one as a spare and just use the new one.
Side note: 3 out of 4 of my plugs were loose. 2 were a 1/4 turn, one was 3 whole turns loose and had cylinder deposits covering the crush washer and allot of the threads. My car feels like a new machine!