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What would cause 1999 Mazda 626 not have any power with fully charged battery?

1. Faulty Starter Motor:

- The starter motor is responsible for cranking the engine. If it's faulty, it may not be able to deliver enough power to start the engine, even with a fully charged battery.

2. Corroded Battery Terminals:

- Corroded battery terminals can prevent a proper electrical connection between the battery and the starter motor. Clean the terminals and ensure a tight connection.

3. Fuel Delivery Issues:

- Check for proper fuel supply to the engine. A clogged fuel filter, faulty fuel pump, or injector problems can restrict fuel flow, resulting in a lack of power.

4. Ignition System Problems:

- Issues with the spark plugs, ignition coils, or distributor cap can cause ignition misfires, preventing the engine from starting.

5. Faulty Alternator:

- A faulty alternator can fail to recharge the battery while the engine is running, leading to a loss of power over time.

6. Engine Mechanical Problems:

- Internal engine issues, such as worn piston rings, damaged valves, or low compression, can result in a loss of power and difficulty starting.

7. Electrical Wiring Problems:

- Damaged electrical wiring or loose connections can disrupt essential electrical circuits, affecting the engine's performance.

8. Faulty Fuel Injectors:

- Clogged or faulty fuel injectors can prevent proper fuel delivery, causing the engine to run lean and lack power.

To diagnose the exact cause, it's recommended to take your car to a qualified mechanic for further inspection and repairs.