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Testing the CO on my 1983. 200 1983

posted by  jgreenwood on  Thu May 13 08:46 CST 2010
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last visit: Sun Sep 11 19:10 CST 2011
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Can anyone point me to the postings giving direction on how to test the CO on this '83 245. I have the multimeter. The AMM has the adjustment screw, with no cover, and I don't know how to measure the fuel richness and adjust. It seems this car is getting poor gas mileage, although running smooth. jg








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Testing the CO on my 1983. 200 1983

posted by  thecbdb on  Thu May 13 11:11 CST 2010
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last visit: Tue Jun 22 12:17 CST 2010
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Hook up to the voltmeter to the O2 sensor and ground it. You should be getting a reading that bounces around between .1v and .9v once the car is in closed loop mode.

Adjust the AMM mix screw until it seems to be centered around .5v

The more accurate way to do this is with a Tach-Dwell, but if you don't have one of those, the volt meter on the oxygen sensor will suffice. Keep an eye on your plug condition.
--
1985 244DL B230 M46 170k








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Testing the CO on my 1983. 200 1983

uid 40935's pic
posted by  Goatman on  Thu May 13 09:40 CST 2010
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last visit: Sat Jul 26 20:30 CST 2014
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Hello,


You must have access to a carbon monoxide concentration quantifier. Without the measure of monoxide within a whole exhaust sample, you will not be able to correctly adjust the fuel mixture.


Goatman








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Testing the CO on my 1983. 200 1983

posted by  jgreenwood on  Thu May 13 09:54 CST 2010
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Sorry Goatman, but could you please put that in english? I am a little slow. Perhaps also tell me how?
jg








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Testing the CO on my 1983. 200 1983

uid 18083's pic
posted by  lucid on  Thu May 13 10:03 CST 2010
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last visit: Fri Oct 24 12:31 CST 2014
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On the other hand, you could try your luck with the "Check/Adjust Idle Mixture" instructions on Bentley pages 241-27 and 28.

--
Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.







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