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Sounds like it is related to the throttle position or things connected to that area.

Pull the accordion hose behind the AMM that goes to the throttle. Look for fine cracks in the voluteor places there might be a hole rubbed into the side. I use a bright light stuck up through the middle.

While you have the hose off clean the bore where the throttle plate flips. Use come carburetor cleaner on a rag. Don't soak the bore as this can harm the throttle position switch.

After all is clean check the throttle position switch for proper clicking just as the plate shows any sign of movement. Adjust on the switch if needed by rotating it under its two screws.

Look around for any other vacuum lines for cracks or looseness. Look on the under side of each end of every hose as this is where cracks or splits hide out.

Post back if you need more hints but from what you say, it's related to the pedal action that makes the problem repeat itself.

That's My best guess, aside from, how much turkey I get to eat?

Phil