03 WRX chugging/jerking on hard acceleration
just picked up an 03 wrx a week ago. runs great drives great. only mod is k&n typhoon intake.
my problem is that when i put it to the floor i will get a chugging or jerking that shakes the whole car as my rpms climb. it lasts from about 3 grand up until i shift, then it will stop. happens in third gear if that means anything. what could be causeing this?
possible relivant info.
this happened about three or four times now since i got the car. on the third time about 30 seconds after my CEL light flashed for a bit while coasting down a hill. the next day it did it again on my way to work. this time it set a code and CEL stayed on. scanned it once i got to work and it came up as a cylinder 1 mis.
I swapped coils on one and three for now so that if the light comes back on it tell me if a coil is causing the mis. in the mean time what could be causeing the chugging?