I just got done with down pipe litter box clean out for the cat, and removed that ebpv, ran like it was mising intermitantly, so i hook up my ae software and did a buzz test, all sounded sharp and snappy but one i believe its # seven not bad but alittle muffled best explains it, the other give away was after idle for about five minutes , it just plain burned your eyes,the scanner says they all passed the test,,,,not convinced.???? ALITTLE MORE HELP If you can??