Yup. Just pull the cable out of the security gateway and plug it into this cable and plug the other end back into the security gateway. It just remembers the setting you set prior.
Used for about six months and then went to a Tazer for additional reasons. Perfect condition. $40 plus shipping to your destination. Without the box it would fit in a small priority mail padded envelope.
Look at what Hootbro said. You can swap coil packs easily. If the coil packs is bad, it will throw the same code, but in a different cylinder. Much better than cherry picking them all.
New to Gladiators. Just bought one a month ago. It looks like these engines have coil packs. If that's the case, could it be a coil packs? That would explain the misfire and potentially the wear on the plug. Used to happen on my Toyota after 80k to 100k miles