Hey guys, ive got a n/a ba xr6 ute. since I bought it, when I give it to it hard it seems to cut out a bit. I'm convinced it's spark, will just new plugs do it? I heard something about coils in them go at around 100,000 kays then need replacing. my utes go 130 on it. if you think its the coils, does anyone have a rough price of getting them replaced? thanks.