My car has no spark and I was after some advice on where I should look. It has been driving pretty normally apart from about 4 cut outs in the past month were it started strait away. But this time it cut out it would not start. After now checking a spark plug and confirming no spark where should I look. It has an after market cran cams fire ball XR700 ignition booster set up(maybe it broke)or could it just be the coil, or something else. How can I check my coil? HELP.