My car is hesitating between 4800rpm and 6000. It kinda bucks a little like braaaaaa, brap, brap, braaaa, brap, braaaaaaaa then clears out after 6k, pulling nicely if i may add. It started doing it a few weeks ago, then i replaced the rear coil and it drove BEAUTIFULLY. Then the next day i added a CAI, and i got the same hesitation. I was thinking it might be my CAI but i rechecked it and tightened everything to make sure there were no leaks. I didnt think grounding would fix it like the 3800 hesitation. Has anyone else ever experienced something like this? Any suggestions?

 

Yeah,

maybe you bumped your AFM plug loose. And it needs to be cleaned and or stuck back together solidly.

After all you add a cold air intake. So that could be it.

Also you might have knocked the hose loose that goes from the CAI part of the AFM to the airpump too. But then again I don't know what CAI you got. MY K&N hose to air pump is blocked off.

Good luck.

 

Plug is fine, but ill double check. No airpump on my car. I made the CAI, its just an extension of any intake you would buy for S4s.

 

Hopefully, my new E-Manage and an MSD 6AL will clear it up. Any comments, hints, tips or suggestions would be great though. Especially if you have experienced something like this. Its only between 5 and 6k rpm, at full throttle. Before and after its fine.