Quote:
Originally Posted by Iyzmi
Fuel trim issues seem unlikely given how long I’ve run this setup with no issues and passed emissions. With everything else checking out fine, I was really thinking the smoking gun is the secondary air mass from lambda bank 1 reading 0 kg/h. This doesn’t appear to be coming from the HFM sensor.
I contacted him through the website.
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That might just be a blocked port in the head. I had persistent 27B0 and it was in fact a clogged port. I have a thread on it with pictures. When I scoped bank 1 it was obvious.