1. Check the spark plug wires. Make sure they are properly connected and not frayed or damaged. Replace any worn or damaged wires.
2. Check the distributor cap and rotor. Make sure the cap is properly seated and that the rotor is not worn or damaged. Replace any worn or damaged parts.
3. Check the ignition coil. Make sure the coil is properly mounted and that the wires are securely connected. Replace the coil if it is damaged.
4. Check the ground strap. Make sure the ground strap is properly connected to the engine and the chassis. Clean or replace the ground strap if it is corroded or damaged.
5. Check the radio antenna. Make sure the antenna is properly connected and not damaged. Replace the antenna if it is damaged.
6. Check the AM/FM switch on your radio. Make sure it is set to "AM".
7. Check your radio's internal circuitry. If the above steps do not resolve the issue, you may need to have the radio serviced.
Here are some additional tips that may help to reduce static engine noise on AM radio:
- Install an AM noise filter. This can be purchased from an electronics store or online.
- Use a shielded audio cable. This will help to reduce the amount of noise that is picked up by the radio.
- Park your car in a location where there is less electrical interference. This could mean parking away from power lines or other sources of electrical noise.
If you are still experiencing static engine noise on AM radio after following these steps, you may need to have the vehicle diagnosed by a qualified technician.