Running too rich of an AFR (too much fuel, not enough air) can cause you to lose power to your engine, and running too lean of an AFR (too much oxygen, not enough fuel) can seriously blow your engine. In the process of an engine tune-up, it’s vital to have accurate and timely air to fuel ratio information because bad ratios could permanently damage your car. Wideband gauges essentially are a helper-tool in tuning your engine. Is it important to get the right AFR? Hell yes! However, if you’re running a more powerful, performance engine, chance are that you’ll be running air to fuel ratios that just can’t be recognized or maintained by a narrowband sensor. Most cars come stock with a narrowband gauge because that’s all they could ever need. Wideband gauges are not an upgrade from narrowband gauges, they just hold a different purpose. And if you care about your cars, you wouldn’t want to make a bad choice on a part that could greatly affect your vehicle’s engine, would you? And if you’re running a performance vehicle you probably care about your cars. If you’re looking for a great wideband air/fuel gauge, you’re probably running a performance vehicle.
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