Originally Posted by Jordo!

Battery is fine.

No intake leaks (replaced a damaged breather, which I thought was the cause, and tightened all hose clamps).

May or may not be more prone to do when A/C running.

Air filters have less than 10K on them.

Any ideas?

I'm down to trying to clean the MAF sensors (I have proper spay cleaner) or maybe having my accessory belt checked for some slip (but under 35K on car...), but both seem unlikely to me...