Review on π Air Fuel Ratio Oxygen Sensor LSU 4.9: Wideband AFR O2 Sensor Replacement, Compatible with Bosch LSU 4.9 17025 and AEM 30-4110 Wideband Kit by Leroy Jacobs
Sensor broken on arrival
I bought this to replace the famous Bosch brand 17025 that is used with the Holley Sniper EFI system. The car had a notoriously good set-up which should have an idle AFR of around 13.5:1. On the first run, this sensor gave erratic readings, going from very lean (35.6) to very rich quickly, almost like a narrow-band sensor. I confirmed the erroneous readings by connecting my laptop to the ECU (see fig.). Bought hoping to save some money on the sensor but obviously it was a mistake.
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