Quote:
Originally Posted by mysocal911
Was this done? With that done and with the O2 sensor disconnected, the duty cycle should be close to 50%, if not the Lambda ECU is bad.
Again, the Lambda system is extremely simple to diagnose!
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Car running, O2 disconnected, AEC unplugged DC did not go to 50% and did not change at all.
Checked connector outs 12 and 14 got OL on both. No ground.
Out of a bit of frustration I then unplugged the lambda ECU, car almost died, richened the mixture and set mixture by the “lift the air plate 1mm” method. Took it for its first drive in a month and it ran great.
So is my lambda ECU bad? If so what next?
Thanks