i do have a stock intake, no open air or anything.
i dont see how it could be occasional misfire really. it only happens when going into 4th gear, and only towards the bottom of it at low rpms.. i wish i had a tach to know what rpms is really does it, because once it gets to a certain point in the RPM's it stops.
the biggest reason im skeptical is because of last time this happened. i had a CEL and it was two codes, lean bank 1 and 3rd cylinder misfire. there were also two very specific symptoms. i had the jerking, which was worse back then, it was basically any low RPM's and then also very little power all the time. when i cleaned my MAF, the jerking went away, but the low power was still there. obviously the new spark plug fixed that.
this reason really makes me think that it wouldnt be a misfire as ive got the power like normal, and since its so specifically just low RPM's.
sorry for the long post, just trying to describe everything in the right words, hope it helps. im cleanin my MAF again, so im sure this is going to go away again, but any more ideas are greatly welcome.
-sean