Erratic Speed Or Engine Shuts Off
WARNING: This page is about a different car, the 1995 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
Check for poor engine performance (surge), defective vehicle distance (speed) sensor, vacuum leak, defective speed control throttle cable, defective vacuum reservoir and/or check valve, torque converter clutch roughness, faulty servo, faulty PCM or excessive load may require manual assistance on hills.