What are the reasons for difficult ignition in a Prado?

[DiCarter]

Reasons for difficult ignition in a Prado are as follows: Low-voltage circuit faults: Such as insufficient battery charge, poor or incorrect wiring connections, poor battery grounding, damaged distributor or Hall sensor, faulty ignition switch or poor wiring, damaged transistor ignition control unit or poor wiring. Most diagnostic methods for low-voltage circuit faults involve using an ammeter or voltmeter to check each wire sequentially to identify and resolve the fault. High-voltage circuit faults: For example, detached or leaking high-voltage wires, cracked or punctured distributor cap, burnt or punctured distributor rotor, excessively large or small spark plug electrode gap, excessive carbon buildup on spark plugs, damaged spark plug insulators, damaged ignition coil or detached wiring. Most high-voltage circuit faults are diagnosed using the high-voltage spark test method. This involves removing the central high-voltage wire or a specific cylinder's high-voltage wire from the distributor, placing the wire end 3-6mm away from the engine block, and starting the engine to test for sparks. A strong spark indicates that the ignition system is functioning properly.