Identifying random misfire

I have a compression tester, would that solve my problems?

Thanks for the reply, how would I check the fuel air and spark on that cylinder without a scan tool?

You can find out what cylinder is misfiring by unplugging and plugging in coils one at a time. What ever one doesn't make a difference is the one with the misfire. Then you can further diagnose what's causing the misfire by checking the basics on that cylinder. Does it have spark, fuel, and compression. If it lacks compression then you need to determine if any of the rockers on that cylinder are loose. If there is a loose rocker you could be dealing with a collapsed lifter and thus the tool could apply.