What are the reasons for insufficient power in Jiangling Shunda?
2 Answers
Incorrect ignition timing. The following are specific introductions: 1. Analysis of insufficient power reasons: Incorrect ignition timing, low fuel pressure, air leakage in the intake system, throttle position sensor or air flow meter failure, poor injector performance, poor EGR system performance. 2. Fault inspection: After starting the engine, check whether the engine warning light is off. If the warning light does not go off, check the fault cause and location according to the fault code. If the warning light goes off, check the fuel pressure of the supply system, the working condition of the injector, and the quality of the gasoline. Whether the ignition timing is excessively delayed. If the ignition timing is excessively delayed during normal ignition, check whether the knock sensor and ECU are normal, whether the EGR system is normal, whether the intake and exhaust systems are blocked, and whether the signals of the air flow meter, throttle position sensor, crankshaft position sensor, camshaft position sensor, and oxygen sensor are normal. If abnormal, check the sensor fault. If normal, check the ignition high voltage and ignition energy during acceleration. If the ignition high voltage and ignition energy are abnormal, follow the fault diagnosis and elimination of the ignition system. If the ignition high voltage and ignition energy are normal, check the ignition timing, cylinder pressure, and engine mechanical faults.
I've been driving the JMC Shunda truck for over a decade, and power deficiency is a common issue with many causes. Fuel system problems are the most frequent, such as clogged diesel filters, insufficient fuel pump pressure, or uneven fuel injection from the nozzles, making the engine run weakly. Using low-quality diesel makes it even easier to clog the fuel lines. The air filter is another major culprit; when dust accumulates, the engine struggles to breathe, reducing combustion efficiency and making acceleration sluggish. Turbocharger issues are also problematic—if it's aging or leaking, power drops significantly at high speeds. Last year, I encountered a situation where the truck couldn't climb a hill, and after inspection, it turned out to be a faulty oxygen sensor affecting fuel control. Prevention is key: regularly replacing filters, cleaning carbon deposits, and keeping the fuel tank clean can keep the truck running strong. Pay attention to the dashboard while driving—if fuel consumption suddenly increases or the engine sound becomes muffled, take it to a professional shop for inspection immediately. Don’t wait until it breaks down on the road and disrupts your business.
