Spark plugs were shot, replaced them, threw in some cataclean, and used a bottle of CRC GDI Intake Cleaner, and we were good. Light went off for two years. I've changed spark plugs one more time since then, especially because I put flex fuel into her a few times thinking she was a flex fuel vehicle (oops)
But it's been years since that has happened.
Anyhow, this time around I've tried everything. New air filter, crc, cataclean x2, flooring it, long highway drives, premium fuel, everything short of replacing actual parts. The spark plugs are fine, but they are far more black than they should be with how old they are. Any suggestions? I'll leave a photo of some live feed data. Please tell me it's not the cat (I live in California and there are no approved aftermarkets I can find, aka need a $3000 cat). Please help.
Saturday, April 5th, 2025 AT 10:33 AM