Master the visual diagnostics of spark plugs to identify harmful rich or lean conditions. In the following sections, we will walk you through some simple steps to identify whether your spark plugs are lean or rich, empowering you to keep your vehicle in top shape. Learn how to read spark plugs by color, deposits, and wear patterns
Iridium Spark Plugs 6-Pack For Lexus RX350, Toyota Sienna, Camry
Identify engine problems early and know when visual inspection isn’t enough.
My interpretation is that i'm running lean more at idle than under load
That would suggest that it's more like a vacuum leak at idle and probably not the fuel injectors since i'm not lean under load. Learn how to read spark plugs to accurately assess your engine’s condition The bottom line when it comes to the porcelain is that the farther up the porcelain that black ring goes, the richer the engine is running, and the farther down that ring goes, the leaner the.
