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duel efie 4 o2 sensors
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soflHHO Offline
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Exclamation duel efie 4 o2 sensors
I have an Infiniti QX56, it has 4 o2 sensors. There are two before the cat converter and 2 after. some sites that sell duel efie say they are only for after the cat converter. are the two before not needed?
07-15-2008 05:59 PM
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JonnyBravo Offline
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RE: duel efie 4 o2 sensors
Actually, just the opposite. The two o2 sensors before the cat converter (towards the engine side) are the sensors that dictate the amount of fuel the computer needs to dump into the injectors. The post o2 sensors after the cat are only there so the computer can sense if the converters are working properly or not... they have no effect on fuel ratio adjusting.

You only need to worry about the pre-cat o2 sensors with an EFIE.
(This post was last modified: 07-15-2008 06:17 PM by JonnyBravo.)
07-15-2008 06:16 PM
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