Re: O2 sensor testing - Saab 900 Bulletin Board - Saabnet.com
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Re: O2 sensor testing
Posted by 89 SPG [Email] (more from 89 SPG) on Mon, 30 Jun 2003 10:17:48
In Reply to: Re: O2 sensor testing, SWEDECAR [Profile/Gallery]
, Sun, 29 Jun 2003 21:12:27
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Thanks Swedecar: My multimeter may well be somewhat off, but I'm reading 12.3 volts on the batt (engine not running, so I don't think its too far wrong). I doublechecked a couple of things:
-- engine temp sensor resistance values seem correct for both a cold and hot engine (per bently)
-- injector voltage is .6 at startup and drops quickly down to .2
BUT
-- 02 reference signal (read from ecu side of o2 plug, with o2 sensor unplugged) is 2.8 volts, not .5
-- I doublechecked the o2 voltage (unplugged). I am getting .04 volts or less, not the .4 I said earlier.
What the heck could be causing this coldstart issue?
thanks
posted by 12.248.12...
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