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#1
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16v 02 wires?
on the 16v, which wire is the signal and which wire is the ground to the O2 sensor? i'm installing an air/fuel gauge and i need to know. my understanding is that i should not try to test the sensor with a voltmeter because it may damage it.
thanks,
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dew 86' 190e 2.3L 16v |
#2
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Jason,
There are three wires to/from the O2 sensor. The two that are the same gauge and use the same connector are the power and ground for the sensor. The single green (?) wire with a different plug is the signal wire to the ECU. You won`t damage it by reading the voltage from the sensor. Leave the power/ground wires connected to keep it properly heated and make sure the motor is good and hot. The green signal wire is shielded, so be careful if/when you decide to splice into it. Tinker |
#3
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what special precautions should i take to spice the shielded signal wire? i am planning on splicing into it.
thanks,
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dew 86' 190e 2.3L 16v |
#4
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you will want to solder the wires from the 02 wire to the Ecu'
you don't want to just twist it up ,it will get a worry reading, hey what meter are you using? I was thinking about going with a mixture read gauge to replace the dead stop watch, Kn has a nice one. Dave |
#5
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Jason,
A sheilded wire is a wire within a wire. The inner wire carries the signal, the outer wire is grounded. Make sure you don`t get them crossed AND you retain the ground. Tinker |
#6
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what i decided to do was just splice into the wire on the O2 sensor instead of modifying the shielded wire that is part of my car.
i got it hooked up today and it works great. i already adjusted my EHA based on the info i got from the gauge. when i went for another test run my adjustment was evident on the gauge. that's rewarding. i'm using the Auto meter A/F gauge in 2 1/16". it has 20 LEDs in 3 colors red=lean orange=stoich and green=rich. i payed $60 for it including shipping. thanks,
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dew 86' 190e 2.3L 16v |
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