my car does the same thing, i think maybe it could be the idle air control valve going bad or its just not warm up yet...

 

bump, having the same issue. think it may be a combo of needing to be warmed up and the cold weather. also, my diverter valve is all gunked up so that may be an issue with getting a proper air reading. going to take it apart give it a good cleaning and then see where I am at. plugs are fine as well, only began happening when it got cold.

the afr's seem to be okay although they do go from lean to rich while it is warming up. no mods since the warm weather an on stock ecu with stock turbo/cams. Going to take a few things apart to spot check them, will update if I find a solution. however if it drives normal once warm, and fires up right away, I wouldnt worry to much about it. gl

 

Ill go with the car isnt warm, I had this problem for a while then i started to let my car warm up cleared things up.

 

X2 my car does the same from when it was %100 stock to now with a few bolt-on's plus it always good for the car to just let it warm up a bit

 

I'm going to try to get this sorted out as soon as I can. I've been lazy because I need new tires to make the 300mile round trip to my tuner. I'm getting new tires wed. or thur. then I'll go in for my winter retune and see what the problem is.