This is driving me nuts. I had a bad timing cover on the bank 2 side and had it replaced at the dealer. They say they also changed both camshaft sensors.

Now the only symptom I have is that I get this strong blip of hesitation exactly at 1000 RPM. I also changed the spark plugs (112k miles) but no affect on this symptom. And, other than this, it drives great.

Any ideas what I could check next..? no codes are thrown.