Hi,
I have the Bentley manual on order. In the meantime, what do these codes most likely point to?
The engine usually runs kind of rough when accelerating, and only when the accelerator is depressed a certain amount.This happens only when the engine is cold. The engine cranks and idels fine.

[align=left]16795 - Secondary Air Injection System: Incorrect Flow Detected[/align][align=left]P0411 - 35-00 - -[/align][align=left][/align][align=left]16684 - Random/Multiple Cylinder Misfire Detected[/align][align=left]P0300 - 35-00 - -[/align][align=left][/align][align=left]16688 - Cylinder 4: Misfire Detected[/align][align=left]P0304 - 35-00 - -[/align][align=left][/align][align=left]16687 - Cylinder 3: Misfire Detected[/align][align=left]P0303 - 35-00 - -[/align][align=left][/align][align=left]Readiness: 0000 0000[/align][align=left][/align][align=left][/align][align=left]Thanks.[/align][align=left][/align][align=left][/align]

 

Maybe the hose on the secondary air pump came off, or the hose is leaking.

Might be a coil, or a spark plug. Swap the misfire ones around, & see if they follow the move.

You might have a MAF that is going out.