not really that bad. it was at one point but twin cam fixed it some. Just slow. Idle alittle up and down but she doesn't shut off. When she first started acting up holy cow. I think the gm maf that i should be getting on friday and installing this weekend should help alot. Let you know how it goes. I will probably need her tuned again since I'll be upgrading. If anybody want to help me tune i would appreciate it. I don't know how the gm is going to affect my safc. Maybe alittle maybe none at all.