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Old 12-01-2008, 09:23 PM   #9 (permalink)
Coyote X
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Join Date: Dec 2007
Location: Southen West Virginia
Posts: 654

Metro XFi - '93 Geo Metro XFi Convertible
90 day: 62.17 mpg (US)

DR650SE - '07 Suzuki DR650SE
90 day: 55.26 mpg (US)
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It depends on the ECU if it is going to help anything with warmup smoothness. But if you do engine off coasting the 1 wire sensors cool down quick and take a few minutes to warm back up even if the engine is at full temp while driving easy. I would suggest using a 4 wire sensor and running the ground back to the ecu to get a lot more accurate signal. On an OBD1 Metro as soon as the water is over 110 degrees I think, and the sensor is reading the car then starts using it.

4 Wire Oxygen Sensor–

lot more info on switching to a 4 wire sensor there.

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