ive seen all these threads with the same problem but still cant find a answer. mine started it today, at idle and at slow acceleration its studdering very bad. AFR is normal, but vac is reading about 15. rpms are at about 200. CEL for bank 1 system too lean. Already changed coil packs and cleaned the egr not too long ago. mods are cai, ssafc, 3" cat back, intake mani. any help or suggestions would really do some good.
