Have a bone stock 2002 E-Glide that, once warmed up (after about a minute of running), drops the front cylinder. Troubleshot the ignition system and ruled out the coil (I think). I get good spark at the plug even when the front cylinder goes down. Chased all the wires and all are good. Could it be an injector? I'm thinking that it's a coil going bad, but don't wanna keep throwing parts at it. Any suggestions are appreciated.