Do you own a Digital Storage Oscilloscope (DSO)? You do? Great! Next question - are you using it? The DSO can be an invaluable diagnostic tool if you're comfortable using it. And that's the hard part, isn't it? Taking the time to become familiar with the tool you own, trying all those cool testing procedures you've read about in our magazine on those "known good" cars so that when a problem does arise, you'll be confident in your ability to accurately perform them. But when you do have a problem that the scope would help you fix, the time and trouble it takes to set everything up is often enough of a deterrent to its use that you go back to the testing methods that are convenient (but not necessarily the most effective).
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