Advanced Engineering Tech - Found gas on a spark plug!

Well on the way home from a local track my friends camaro starts to misfire but theres no check engine light we get to his shop and we started to check the plugs and all r burned but one which is covered in gas so we got a new coil, spark plug wire, and spark plugs and we try it again and the same thing happens the same plug is covered in gas so he took the injector to a local shop so it could get rebuild and after that still the same problem so my question is what could it be has anybody expirence this before right now were :confused:

try pulling out the plug and earth it out to see if it sparks is so, take the covers off and make sure you haven't broken a spring. the next thing is to do a compression and a leak down test.

try pulling out the plug and earth it out to see if it sparks is so, take the covers off and make sure you haven't broken a spring. the next thing is to do a compression and a leak down test.

we found the problem a couple of days ago and it was a broken rocker arm (yellow terras) split in two dont know how it happened and we checked everything else and looks good should be up and running when he gets the new rocker arm in.