In a 1984 Club Car cart move the forward reverse lever and sparks fly put in moves little with foot off accelerator. Same reverse. Is this motor or solenoid problem?

The symptoms you describe could indicate a problem with either the motor or the solenoid. Here are a few things you can check to help determine the cause of the issue:

1. Check the battery: Make sure the battery is fully charged and the connections are clean and tight. A weak battery or loose connections can cause the motor to spark and run erratically.

2. Inspect the motor and solenoid: Look for any signs of damage, such as burnt wires, loose connections, or melted components. If you find any damage, it will need to be repaired or replaced.

3. Test the solenoid: To test the solenoid, you can use a multimeter to check for continuity. If the solenoid is working properly, there should be continuity between the two large terminals when the key is turned to the "on" position.

4. Check the motor brushes: The motor brushes are responsible for conducting electricity to the motor's armature. If the brushes are worn or damaged, it can cause the motor to spark and run erratically.

If you are not comfortable performing these checks yourself, you can take the cart to a qualified mechanic for diagnosis and repair.