Stuttering problem at every stop......

I have a problem, my head gasket was compression tested and it showed 100, 125, and 130 psi on the rear cyclinders. I have since then done a liquid glass with copper treatment and a heavy duty bars leak treatment. I thought that the stutters was from the gasket, but now im not so sure. Everystop unless i kinda roll through it, my car almost stalls a couple of times before going good. I had a friend whos headgasket was going and he was losing power that he couldnt even go, i dont have that problem, yet, but what could my problem be? Spark Plugs, wires, fiel filter? Maybe the head gasket still??? Thanks

My car is a 99 GT, so i don't know if this will apply to you, but I had the same problem with mine. After a few weeks I heard a pop, service light came on, n smoke out the exhaust. I thought it was the head gasket, like you think yours is. It ended up it was the intake gasket, and when that went out it ruined my starter. The dealership fixed it for free, thank god, cuz it was a $900 repair. So, long story short, maybe check the intake gasket as well? Hope that helps.