I would of expected fuel trims to have less correction with air mass diss connected , try at 2000 rpm see what they do then .
I'm wondering why if cam timing is out why ecm is not seeing it , if exhaust cam is off a tooth so would inlet cam be off , unless for whatever reason someone has been messing in the rocker covers with the chains and the inlet cam is correct but exhaust is off so that's why no crank / cam correlation codes .
Saying that I've had corsas and bmw mini with chains stretched to death a few teeth out and they have not flagged crank / cam correlation codes .
Can you get just the upper belt covers off and take number 5 spark plug out and get tdc with a screw driver down plug hole or get the pin that goes into the web it's a bar that goes across cams to check cam alignment I believe
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