Is My Convertor To Loose ??

[BIGPSI]

I Have Been Getting Knock At Wot.do You Guys Think The Loose Convertor Is Making The Stock Motor Hit The Rev Limiter Thus Causing False Knock.my Scanmaster #s Look Ok,o2sbut Inthe Teens On Knock.does Not Knock At Part Throttle.never Had This Much Knock Before.by The Way Its A 9"3500 Non Lup.