Technology has passed me by. So please be patient with me here. I have a 1998 Jeep tj 2.5 with a slight misfire. Not bad enough to throw a code. I bought a cheap 327 tester and when I run a test it shows a few results witch I kn ow nothing about and later at the bottom it tells me test failed or its incomplete. How long should the testing take ?I would realy like to track down this misfire issue I have.

Thanks for any help