after getting protuned yesterday on the way home i started getting a cylinder 1 misfire. the misfire was not present on the dyno, nor on the road test, and was not present for most of the way home.
when i got off the highway, and hit boost in 2nd gear, the car started bucking and stuttering. this issue was not present in 1st gear from what i could tell. eventually it threw a CEL when i was about 8psi of boost in 2nd gear. the misfire was present in 3rd as well, i did not want to push the car anymore so i dont know about 4th or 5th.
using the accessport to check roughness it was not misfiring in vacuum, only when it was on boost above 5-8psi.
I e-mailed the tuner asking what hew thinks happened, and he recommended checking vac/boost lines, swapping coil packs, and swapping injectors to see if the misfire follows. is there any other things you guys recommend checking to see what the issue is? about 2-3 weeks ago i had a compression test and all cylinders were 135psi, is that too low? there was still no turbo shaft p[lay as of a week ago.
car is a 2006 Legacy GT, catless uppipe, catless downpipe, catback, CAI, EBCS, LWCP, and a stage 2 protune