I had my plug cap come loose once after several tanks of gas. Really made the throttle servo jittery. I realized that I was getting interference and after a few seconds of troubleshooting the problem, I found the loose cap. I tightened it up (turned it 1/8 turn) and the servo went back to normal. I haven't had it come loose since and I check it before every flight now. I do have the cable flexed in the direction of the turned cap to give it tension. I DID have a problem of the braided cable getting scuffed and slightly frayed where the cable exited the firewall. I wrapped electrical tape around the plug wire and no more frayed cable.

Also, after a gallon of gas, I have very little “black goo” now. Cleans right up with Clorox Disinfecting Wipes (green bottle that “now cuts grease”).

Dave