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Steffeydj

Marina Del Rey, CA

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Question Asked: 

Answers to previous questions regarding this sensor and failing CO Test on the referenced vehicle proved very helpful. However, for future reference there is only one O2 sensor on this vehicle located in the left exhaust manifold where the right exhaust bank joins (no dual exhausts on this model). Purchased OEM O2 sensor for $67 and installed myself (1 hour job). Vehicle passed retest in the CO and other categories with "flying colors" with very low readings. Also increased gas mileage significantly. Above info just in case anyone else has similar problems.


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Question Asked: 

Does the oxygen sensor directly measure the amount of oxygen in the exhaust gases or is it a thermocouple type device that measeures exhaust gas tempatures and this information is then used to determine the amount of oxygen in the exhaust gases? Is there a way to test a oxygen sensor out of the vehicle with a VOA meter or other device to determine that it is working? How many oxygen sensors are on a 1986 Nissan 300zx? Is the sensor or sensors located in the exhaust manifold or elsewhere? Thanks, awaiting a reply.


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Question Asked: 

vehicle is a 1986 model (year not on drop-down menu) Vehicle failed CA smog test (test only) in CO 25 mph test, it was .64 (max .60) Within limits at 15mph test. Noticed that "engine CK light" recently comes on when car is first started, but goes out within 1/2 mile of driving prior to full warm-up. Gas mileage is also somewhat lower than normal. What are the likely cause or causes? Please advise estimate of repair cost and estimated cost of any parts likely needed to be replaced? Thanks!!


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