What are the solutions for difficult starting of Isuzu engines?
2 Answers
There are many reasons for the difficult starting of Isuzu engines. The following are specific introductions and solutions: 1. Poor fuel supply in the low-pressure oil circuit: The troubleshooting method is to find and replace damaged or aged gaskets, joints, or oil pipes; To prevent such failures, frequently clean the fuel inlet filter screen and diesel filter element, regularly inspect the pipelines, and solve problems promptly when discovered. 2. Broken piston spring of the fuel transfer pump: If the engine suddenly stalls during operation and cannot be started, and after exhausting the air and restarting, it resumes normal operation for a certain distance before stalling again automatically, it is likely that the piston spring of the fuel transfer pump is broken. The troubleshooting method is to unscrew the screw and replace the spring to resolve the issue. 3. Blocked high-pressure oil pipe: The inspection method is to loosen the fuel inlet end nut of the high-pressure oil pipe cylinder by cylinder. When the knocking sound disappears after loosening a certain cylinder, it can be determined that the cylinder is the faulty one. Replacing the oil pipe will resolve the issue.
Having driven Isuzu for many years, I've often encountered starting difficulties, mostly minor issues. First, check if the battery is low on charge or if the terminals are loose. Use a multimeter to measure the voltage; if it's below 12 volts, it's time to recharge or replace it. Second, inspect the fuel system. A clogged fuel filter can restrict fuel flow—pull off a fuel line to check if the fuel supply is smooth, especially common in older vehicles. Third, pay attention to the ignition system. Spark plugs may be fouled or worn out; remove them for cleaning or replacement. Damaged insulation on high-tension leads can also prevent ignition. In winter, thickened fuel makes this issue more likely—switching to low-temperature engine oil and adding anti-freeze additives works well. If you hear the starter motor whirring but the engine doesn't turn over, it could be a faulty starter motor or relay. Avoid forcing it to prevent damage. Develop a good habit of preheating during cold starts and perform regular maintenance to save a lot of trouble.
