02 Sensor?
Thread Starter
Instructor
Joined: Jan 2002
Posts: 227
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From: CA
02 Sensor?
I have been having problems with my 1990 latley. Drivability problems, smelling of gas, like the car wants to stall when at a stop. I am suspecting there might be an O2 sensor problem. Not getting any codes. Is there any way to test the sensor? Thanks!
Le Mans Master
Joined: Mar 2000
Posts: 7,805
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From: If you read this, you'll go blind
It sounds like it. If they are reading off, it can run real rich.
You can check the voltage with a tech tool. I guess you could try with a multimeter, but it would be difficult to probe.
You could also just take them out and give them a visual. When mine went bad, it looked real bad when I took it out (like totally caked up with crap)
You can check the voltage with a tech tool. I guess you could try with a multimeter, but it would be difficult to probe.
You could also just take them out and give them a visual. When mine went bad, it looked real bad when I took it out (like totally caked up with crap)
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Best way is with a data logger than can monitor 02 voltage activity real time. The readings should QUICKLY cycle from about .1 to .9 mV. Each time the voltage crosses .450 the 02 count activity number should increase.
You can also connect a jumper to the ALDL and watch how quickly the SES dash light flashes. This'll tell you if the system is going closed loop. Insert the jumper into A&B, start the engine and watch how frequently the SES flashes.
Jake
You can also connect a jumper to the ALDL and watch how quickly the SES dash light flashes. This'll tell you if the system is going closed loop. Insert the jumper into A&B, start the engine and watch how frequently the SES flashes.
Jake
Melting Slicks
Joined: Oct 2004
Posts: 2,510
Likes: 4
From: Austin Texas
here's a good URL with pics of visually bad O2 sensors and what caused the problems:
http://www.ngkspark.com.au/tech_info...sors_index.htm
hope it helps...
http://www.ngkspark.com.au/tech_info...sors_index.htm
hope it helps...
