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Discussion Starter · #1 ·
Have lean (+10-+15% fuel trims both banks).
Smoked (pressure tested) the engine, found 'hockey puck' on top of engine letting lots of smoke out.
Replaced with new.
Still getting lea code.

What else is common cause of lean code?

Also: 13 mpg is best I can get, was once 16 mpg worse.
 

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My lean codes were from bad injector o-rings allowing air to leak by. Worth a shot to check
 
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