4-wire o2 questions
04-03-2006, 05:33 PM
#1
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Car: '88 G T/A
Engine: L98
Transmission: 700R4
Axle/Gears: 3.27 9 Bolt
4-wire o2 questions
I have an AFS 75 four wire Oxygen sensor supposedly off an LT1 Trans Am. I was wondering which of the wires is the signal? There is two brown (assuming the +12v and gnd for heat), a purple and a white. Is the extra fourth wire just another ground?
Also, what causes the sensor to wear, time or mileage? The sensor came off a car with 9,000 miles on it but it is about 10 years old.
Was wondering because i want to put it on my GTA.
Also, what causes the sensor to wear, time or mileage? The sensor came off a car with 9,000 miles on it but it is about 10 years old.
Was wondering because i want to put it on my GTA.
04-03-2006, 06:14 PM
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Car: '88 G T/A
Engine: L98
Transmission: 700R4
Axle/Gears: 3.27 9 Bolt
Thats what im looking for! Any idea if this thing is still good after 10k miles and 10 years?
04-03-2006, 06:54 PM
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Car: 77 El Camino
Engine: 355 Converting to TPI
Transmission: Converting to 4L60/4L60E
Sorry, the only way I know to check a O2 Sensor is on the vehicle. It has to be at operating temp before you can determine if its good. You also have to follow the service manual due to a couple of different types of heated O2's. If you use the wrong testing procedure it could kill the sensor. There are other things which can also kill a O2. Several years ago we (Automotive Indrustry) were having problimg with dead O2's. It turned out to be that RTV was the culpret.
Bill
PS Now we just need a spell check
Bill
PS Now we just need a spell check
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