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Old 01-02-2007, 08:02 PM   #1 (permalink)
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o2 sensor wiring question

i have a h22a motor in my 94 prelude. i need to hook up the o2 sensor but cannot find the wiring diagram anywhere. i also installed a DC header from a SH lude. anyone know where to get the wiring diagram? i cant find it anywhere. my cars idling jumps at times and i was told it's because of the o2 sensor... please help thxx!
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Old 01-02-2007, 11:36 PM   #2 (permalink)
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wiring is strat across from the old one to the new one the h22 does use a differnt o2 than the h23 though
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Old 01-03-2007, 12:39 AM   #3 (permalink)
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yeah but i have a SH header/down pipe with a h22 motor. would it be the same o2 sensor? my friend works for acura and said he would do it, he just needs the wiring diagram
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Old 01-03-2007, 01:45 AM   #4 (permalink)
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Well there are only four wires (with two of the wires being different colors)

you should be able to match it up (unless you are using a universial one) then the two black wires are a toss up (i've hooked mine up twice and got it right)
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Old 01-03-2007, 02:10 AM   #5 (permalink)
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White is From sensor to ECU, the two blacks are heater, the other should be sensor ref
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Old 01-03-2007, 06:30 AM   #6 (permalink)
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would the o2 sensor not being connected, cause my idling problem?
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Old 01-03-2007, 08:25 AM   #7 (permalink)
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hell yes it would

and all hona o2s will screw in
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Old 01-03-2007, 02:53 PM   #8 (permalink)
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well they are both already in . the one hooked up to the downpipe was already in when i bought the DC header last month. i jus thave to wire them up but my friend said get the wiring diagram. does he need one? what should i tell him?
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Old 01-03-2007, 10:51 PM   #9 (permalink)
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^errr why are "both" hooked up?

i thought you had a 4th gen 1994 model? which would mean obd1 which would mean 1 02 sensor? or maybe i just missed something
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Old 01-03-2007, 11:16 PM   #10 (permalink)
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yeah i have a 94 but a 99 h22 motor is in it. sorry i just got the car 3 months ago , and don't really know too much about it. just need it to be wired
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Old 01-04-2007, 10:33 AM   #11 (permalink)
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The two black wires are for the heater. You can hook them up either way, it's just a resistance heating element.
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Old 01-04-2007, 10:56 AM   #12 (permalink)
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well he said get him a wiring diagram? do you know where to get one?
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Old 01-04-2007, 11:12 AM   #13 (permalink)
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you might want to check 5th gen forum since most of us just have 1 o2 sensor.

but you might want to get yourself a helms as well
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