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Ronnie's.930 Ronnie's.930 is offline
Join Date: Nov 2007
Location: Rockwall, Texas
Posts: 8,760
Originally Posted by Speedy Squirrel View Post
First, get the car up to normal oil temperature by going up on the freeway and stomping a Mustang. (That last part is not per the manual).

Disconnect the O2 sensor plug connection on the left-hand side at the rear of the
engine compartment.

On the SENSOR end of the plug, check the voltage between the terminal with the Green wire and engine ground. It should be in the range of 0.1V to 0.95V. If it is running rich, it should be somewhere around the 0.8V to 0.95V range.
Ok and thanks. I will do this sometime today. And excuse my ignorance, but what is this going to tell me (for instance if the voltage numbers are within spec or if they are in the rich range)? Am I simply trying to verify that the engine is indeed running rich, as it seems to be, or am I testing to see if the O2 sensor is working? I'm a bit confused about this for some reason . . .

Thanks for your help, everyone!
Old 01-24-2013, 06:05 AM
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