Nate6.0

Yes, I was very pleased. Thank you all for the info, suggestions and tips.

So today I took a drive and my early Christmas present…engine light off on its own!!!!! I guess the anti foulers worked and I don’t even have to feel too bad about the actual environmental impact because it has 2 brand new cats doing their thing, just not CARB cats…what a journey

I spaced the sensors out with modified non foulers…how long should it take for the CEL to go out if this is effective?

so I can expect an efficiency code until procuring and Installing a CARB cat?

E87 for the 3 months I’ve owned it

How would I determine this if in open loop? Regarding exhaust, yes it’s brand new manifolds, gaskets and cats/ y pipe…I replaced them all thinking my cat efficiency code was due to exhaust leak.

Bump

Here is video starts at idle then about half way I rev to 2k and hold at 2k and here is only idling both are after a drive so everything is up to temp

Any Thoughts/feedback on O2 readings? I can get more data if that would help

And here is bank 1 sensor 2

Ok took these today…this is after 20 min drive so everything is up to temp.

Funny you are posting this, and it’s leading me to think my federal emissions cats are not the issue. To your question above, from my research the CARB cats may not be any different at all, but require the mfg to warranty them to 8 years / 80k miles so probably many mfg don’t seek the CARB certifications. This would also be supported by your experience with federal magnaflow cats working fine.

Thank you! This is both encouraging and frustrating . do you think I could 1) flash the vehicle to match the non CARB cats I have? 2) space the sensors out of the exhaust? if replacing cats is my only option so be it, but figured I would inquire about all options before proceeding, especially if there’s even the slightest chance that the CARB cats would not eliminate the codes.

Sure, I took this when i was confirming which tccm I needed when the 4wd went out

That was a major part of my replacing the manifolds…4 bolts were broken and I suspected possible air ratio errors due to potential leaks…that and when I tried to remove the Y pipe it quickly became clear the manifolds were along for the ride

i was getting the code before I put the cats on…not saying it’s not possible that the PO cats were bad and so were my brand new ones, but it seems like a reach. The parts list was for various reasons, not all for the catylist codes…it needed plugs and wires regardless, needed crank position sensor because it failed one day etc etc. i listed the parts to help fully define the situation for anyone reading.

Hi all, I have a 2007 5.3 throwing codes for Catalyst efficiency bank 1 and 2. I have been chasing this like crazy and am at whits end…hoping an expert can help. In my efforts to resolve I’ve just done in the past 8 weeks… New fuel sending unit (old one rotted) 8 new plugs (AC Delco 41-162) 8 new plug wires new driver side valve cover (updated style) and pcv hose (to ensure no leaks) new exhaust manifolds and gaskets both sides 2 new cats/ y pipe (Davico $550) 4 new oxygen sensors new coolant temp sensor new crank position sensor cleaned MAF cleaned throttle body as you can probably imagine I’m beyond frustrated at this point. What else would cause the catalyst efficiency codes? When I clear them they return.

That looks so sweet...I was thinking about swapping to leather from my cloth but was thinking of keeping it to same generation.