Very possible I have an idea to check and see if it the rear cat that needs to be replaced now being a girl and all I am flying so low here so lets see what you think if I disconnect the exhaust pipe from the main cat(s) and start the car and rev the gas to see if the egr pressure sensor hoses blow off and if they do then it is not a rear cat problem correct and if they dont then it is a rear cat and maybe a muffler too what do you think I am trying to trouble shoot myself I just put a large amount into this with no result and back to where I was at the begining when this started happening so tell me your thoughts it does have 149K on it but no payment so I have to expect some expense but this is crazy to be back to square 1