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what I do
Posted by dave n (more from dave n) on Wed, 19 Dec 2001 17:26:19
In Reply to: Just Exactly What Does the AMM Do?, KevinD, Wed, 19 Dec 2001 16:22:15
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Unplug the o2 sensor green wire from the car harness. Attach voltmeter and turn amm 'till you see 0.5 vdc. IT should not vary much since it's unplugged and the ecu is running open loop. Then plug the O2 sensor back in and see how the volts fluctuate. IF it doesn't fluctuate at all or slowly, the sensor is bad or your engine is still cold. IF it's fluctuating, see if it goes from 0 to 1 volt. THen tweek it a little if needed. After trying that, try tapping on your aic valve when the idle acts up. Another thing you could verify is your NTC sensor. It's unlikely but easy to check the ohms and compare it to the book values for given temp.
dave n
posted by 24.252.2...
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