Well ever since I bought my GTA its had a cold starting issue. When I start it and I don't touch it it idles fine, its A OK. BUT if I try to drive it before the engine reaches about 130 F the engine will make knocking noises and sound and feel like its stumbling around. I don't know what to do with it. I have been suggested to run the next range hotter spark plugs, and gap them about 5 thousands over what I have them at now. The car always gets premium gas, I was also told it could be the Idle air control valve? Does anyone have ANY ideas? It would be greatly appreciated! Thanks guys!

 

I was going to say too, after its warmed up the car sounds and drives healthy, no knocking, no hesitating just like a brand new car. Its just a bitch when its cold!