Hello,

As stated, fighting insufficient air flow on both banks.


1. New vac lines, combi's, air pump, all test out ok including the relays, vac relays etc.

2. Appears to run and put out a lot of air as it should.

3.BUT...Also seeing P0420 bank2...For the sake of ease, I R/R upstream and downstream 02's on bank2...Still an issue

so it looks like the cat.


So my question is...Can the cat cause the insufficient air flow? But both banks is the concern..so it seem odd..


Thanks for any and all info!!