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Is there any need to run a ground to the 3-wire O2 sensors ? 700 1985

posted by  pbonsalb on  Sun Sep 5 23:32 CST 2004
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last visit: Fri May 9 09:43 CST 2008
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There are 4 wire 02 sensors with a separate ground.

The 3 wire unit grounds through the exhaust. Just make sure your engine to chassis/battery grounds are fine.

A one wire sensor is fine if it is mounted high up in the exhaust so it runs hot, but your emissions will be worse for a minute until it warms up and your idle could also be rougher for a minute until the 02 smooths it out.

Philip Bradley






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New Is there any need to run a ground to the 3-wire O2 sensors ? [700][1985]
posted by  ndesouza  on Sat Sep 4 21:44 CST 2004 >


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