When I accelerate in my 2003 Grand Prix GT I have an issue fairly rarely(maybe once every 3 or 4 times I drive) where it will stutter and not want to give it gas. I'm thinking it may be the intake because I have an open cone filter(and I hate it, waiting til next Thursday to order a ZZP Wizaired CAI) and am wondering if something about this could be causing it. Today I got some more details which pushed me to post about it again. I had the throttle body screen removed because it was filthy, and got a new one. While it was off it seemed to have this issue more than when I put the new OEM one on. However it is still happening every now and then. Today I pulled out of quicktrip onto broadway, it is a left turn up onto a ill, which is where it usually happens(almost always this spot, but left turns up hills in general). It stuttered once, then shifted. After it shifted I noticed a whine from the engine bay that was not there before. It lasted until I turned the car off at home. After I let it sit turned off for a few minutes and turned it back on, I could not hear it. Any ideas of what this could be or what I should check, or any more details you would like?