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Old February 13th, 2011, 13:49
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Ecomike Ecomike is offline
NAXJA# 2091
Join Date: Dec 2006
Location: MilkyWay Galaxy
Posts: 15,332
Re: Testing Jeep O2, Oxygen sensors

I found a good link on this topic topic:

Also, I read that pulling the connector on a single fuel injector at a time, (or now that I think of it, a spark plug wire), can be a useful test while watching your live O2 sensor data!!!!!! It would give you useful data on injectors, spark, and the O2 sensors! Same goes for creating a large vacuum leak, by pulling a vacuum line loose, to see if the O2 sensor shows a lean shift, lower voltage. Note that pulling the vacuum line off the renix fuel pressure regulator may make it rich, not lean, and the MAP sensor is not a good one to use either. The Vac line to valve cover is an option on Renix. The idea is to see if the sensor correctly sees the rich or lean shift when it happens. Might also be useful to let an engine idle for 5 minutes, then run the tests, to see if the sensor heater is actually working.
Quote=8Mud: "Go ahead and put up the best fence you can build, I'll bet on some Mexican with a few dollars of nails and a pile of scrap lumber."
34 MPG , '85 2WD Cherokee Pioneer with custom installed, 64 hp, 2.2 L Nissan SD22 Diesel 5 spd Manual; & 4 Renix XJs, '87 Wagoneer 4.0, 4WD, 89-Cherokee, 4WD, '87 Cherokee 2WD, & '89 Cherokee Pioneer 2WD, all 4dr. #2091

Last edited by Ecomike; February 13th, 2011 at 13:56.
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