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can someone outline the procedure for setting the fuel mixture? 200 1984

uid 27's pic
posted by  Art Benstein on  Fri Aug 5 08:48 CST 2005
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last visit: Fri Oct 17 20:10 CST 2014
[RELATED]

Congratulations you fixed it!

Sorry if I steered you first to the ect and fpr in your other post, but the amm is usually not known to be the cause of full rich if not in limp-home (broken wire) or, as in your case, suspected of being "adjusted".

Your objective is to see it flip the voltage with about equal time rich and lean. The timing is hard to see on your DMM, but the test point (pink wire next to base idle test point) follows the oxygen sensor. You could put your meter there, too, just to see how the ECU interprets the lambda sond.

The idea of setting it to a particular resistance is an effort to get the mixture near enough to the range of closed-loop operation, which is what you see with your DMM on the sensor lead, flipping back and forth - should be about one cycle per second thereabouts.
--
Art Benstein near Baltimore






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