there is only one o2 sensor on the 90-94 protege and to make it realy simple it is a one wire sensor. (ymmv)
i do suggest you install an a/f gauge they are very helpful in trouble shooting your car. and if you plan on seriously tuning your car i would strongly suggest it is one of the first gauges you buy.
i do suggest you install an a/f gauge they are very helpful in trouble shooting your car. and if you plan on seriously tuning your car i would strongly suggest it is one of the first gauges you buy.
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