So now that I have your attention I need your help! I did a search on this before I posted and there was a similar topic but the situations are different
So occasionally at stop lights when the truck is just idling it will sputter, and it will do so every few seconds but as soon as i take off its smooth as eggs! well yesterday I when i stopped my truck it was idling pretty rough, so i shut it off and 10 minutes later started it, still rough. I shut it off and brought someone over to observe this naughty behavior and of course she purred like a kitten..
I went by to get the codes checked out and I pulled a P0430 and P0420 (cats below efficiency)
my question is what steps can I take before replacing the cats, or what do you think it could be?
the truck has Doug Thorley Short tube headers and 74000 miles
So occasionally at stop lights when the truck is just idling it will sputter, and it will do so every few seconds but as soon as i take off its smooth as eggs! well yesterday I when i stopped my truck it was idling pretty rough, so i shut it off and 10 minutes later started it, still rough. I shut it off and brought someone over to observe this naughty behavior and of course she purred like a kitten..
I went by to get the codes checked out and I pulled a P0430 and P0420 (cats below efficiency)
my question is what steps can I take before replacing the cats, or what do you think it could be?
the truck has Doug Thorley Short tube headers and 74000 miles