[golem]

My geezee seems to die down on me at random interval.
I had the needle shim mod done by a professional but could this be the reason for it not to work so good anymore?
Before that I also had tried to do it myself and went as far as removing the tank myself before realizing what I was doing and putting it back. I know the engine works with a vacuum, is there a step where you have to put the engine under vacuum after putting the tank back maybe? Or this has nothing to do with my problem?
My battery is new so I don't think it's that and the ground wire is well connected to the battery. What else could it be?
I don't lose power when it happens, it always seems to happen on an incline for some reason but this might be unrelated. When it happens, I play with the petcock and it seems to bring it back to life but once again, not sure if it's related. It happens when I accelerate.
Please let me know if you have any idea on what it might be, thank you.