Originally posted by ecallen:
...Also, is there a way to test to see if the cat(s) are bad and which ones (precat vs. main cat)
Thanks
!!
A good cheap way is to remove the O2 sensors, in this order (and see if the performance improves). Uninstall Bank 2 lower (radiator side) to determine if main cat is plugged, reinstall Bank 2 lower and then uninstall Bank 2 upper (radiator) to determine if Bank 2 precat is plugged, reinstall Bank 2 upper and then uninstall Bank 1 upper (hardest one, close to firewall) to determine if bank 1 precat is plugged. You don't need to mess with bank 1 lower as bank 2 lower will also be a test of that issue too (if it is an issue). Good luck.
"Always do the cheap and easy ones first."
1996 V6 ATX 96K miles
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