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Porchdog Porchdog is online now
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Join Date: Jun 2008
Location: SE Pa.
Posts: 1,226
The O2 sensor was brand new when I installed the AEM - so a couple thousand miles. AEM has an output to emulate the old single wire O2 sensor. It wouldn't be much trouble to swap back to the original sensor, but then I wouldn't see the mixture on the AEM.

I always used a dwell meter to read duty cycle.

When it's misbehaving it always goes lean. I'm pretty confident that everything on the ignition side is solid.
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1981 911 SC
2013 Mini Cooper JCW
2017 GMC K1500
Old 04-05-2019, 10:15 AM
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