There sounds like a loud exhaust change in the right rear of my 2005 Nissan Pathfinder around 2500rpm. Just had the o2/ catalytic conv replaced. Any hints on what I may be dealing with?
This was a used purchase that I may be starting to regret. 139,000 current miles on
the vehicle. Feels like it is running smooth after having the o2/ catalytic replaced. Wife
is normal driver of vehicle and told me it sounded like a Harley Motorcycle was coming
on the right side. It happened over and over until she realized it was her car. I took it
out and sporadically around 2500 rpm there does seem to be a change in the exhaust
sound.