ok... if you have acces to an o scope, check both sensors on the bank 1 side. if they are switching at the same time, you have a bad cat. but from the sound of it, it sounds to me like you either have a lazy 02 sensor or a bad cat. Lazy 02 meaning it is not switching as many time as it should in 1 second.
On a scanner, go to live stream data list and you might be able to trell if they are switching at the same time.
The o scope is the best way to go.
1998 GMC Sonoma Ext. Cab two seater.... system is a must!
1972 Camaro-The Beast
2008 Chevy silverado. 3-5 drop. 18'* nice grill...nice truck...
1974 Datsun 260ZR- 94 RB25DET Swap... Stupid fast!!!
Originally Posted by Bwayney
This is awkward...