87 YJ Losing Power

My Jeep jerks violently when driving between 40-60 mph, often causing it to shut down or forcing me to turn off the ignition. After restarting, it may run smoothly for another 40-60 miles. This issue is unpredictable and doesn’t always happen while driving. Any help would be greatly appreciated.

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It sounds like your engine might not be getting enough fuel. Have you adjusted the carburetor to match your surroundings?