Installing a Spark Plug Non-Fouler: Cheat Code or Complete Waste?
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Tip: Get 90° non‑foulers for O2 sensors
Do Non‑Foulers Fix P0420? Real Test
Spark plug spacers for CAT codes + smog. Pros/cons revealed.
⏰ Timestamps
0:00 Non‑Foulers vs P0420
0:38 O2 Sensor Basics
1:48 CAT Efficiency Trick
2:30 Better Non‑Fouler Version
3:41 Downstream O2 Location
4:57 CAT Monitor Setup Tips
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