I posted yesterday about iginition noise on my radio. I installed a Kenwood CD reciever with 4 new speakers 2 weeks ago. Sounded great with no problems. Yesterday I installed new NGK platinums. Coated top of plugs with dielectric grease. Now I have a spark tick noise on the radio. Does anybody have any suggestions on what to do to eliminate this noise? Plug installation went withouit problems and I can understand what could be causing the tick. Please help.