The mystery of the 2.4 radio interference problem (well mine anyway) is solved! I tried a champion brand plug, and fail. I bought one of those E6 plugs from Home Depot, you know the ones that are direct replacements for many different plug types including the NGK BPMR6F plug (the one recommended for my engine). I tried this new plug and bam! MY RADIO STILL FAILED EVEN WORSE!!! I finally said to myself; dang it self, just suck it up, order the NGK BPMR6F plug from www.sparkplugs.com , pay the $10.00 shipping and try it. So I listened to myself. The plug arrived: I installed it: I tried it: And BAM! IT WORKS LIKE A CHAMP!!! Not one glitch, not one radio lock up, just one SWEEEEEEEET! running engine! Goes to prove; just use what the book calls for and you can't go wrong.