I stripped my factory system from the headers back and replaced with a ss system from TimeValve. I found a second cat right at the header which was supposedly there because it was originally set-up for California Emission standards. I left it out when I installed my TimeValve system, using only the single cat that came with the new system.
The idle is not what it once was, more rumblely, throaty with a slight stutter during idle.
Question: Anything I should do regarding fine tuning the timing/carb/air/fuel ratio set-up?
p.s.-All injectors are new