What is the reason for JAC Refine having fuel but no high-voltage spark?
3 Answers
JAC Refine having fuel but failing to start requires checking whether the engine's cylinder pressure is normal, and whether the engine's timing system is misaligned. Alternatively, it could be due to the car battery being dead after a long time or electrical devices in the car leaking power and draining the battery. The issue could also lie with the starter motor. Solutions for JAC Refine having fuel but failing to start are as follows: Starting Circuit: The inspection of the starting circuit mainly refers to the contacts of the ignition switch rear connector. If the ignition switch base contacts are burnt, it will cause poor contact failure. This can be checked via jumper wire inspection or voltage testing to determine if the issue is with the ignition switch base or the starter relay. Otherwise, replacement is necessary. Electromagnetic Clutch: For the electromagnetic clutch, it refers to the starter motor. If the starter motor's electromagnetic clutch contacts are burnt, it will also cause this type of failure. Otherwise, repair or replacement is needed. Battery Terminals: For battery terminal issues, it is usually due to corrosion and oxidation faults, where some corrosive substances form on the battery terminals, leading to poor contact of the main power line. Otherwise, cleaning with hot water can resolve the issue.
I've personally repaired quite a few JAC Refine vehicles, and encountering situations where there's fuel but no high-voltage spark is quite common. First, it could be an issue with the ignition coil, which is responsible for generating high-voltage electricity. If it's aged or burnt out, the spark plugs won't ignite. Second, sensors like the crankshaft position sensor might be faulty; if the ECU doesn't receive a signal, it won't issue an ignition command. Other possible causes include aged high-voltage wires, excessive carbon buildup on the spark plugs, or a blown fuse. Last time I helped a friend with this, the inspection sequence started with the simplest steps: try replacing the spark plugs first. If that doesn't work, use a multimeter to check the voltage of the ignition coil. If that still doesn't solve it, check if the sensor wiring connections are loose. Additionally, JAC Refine models sometimes experience short circuits due to worn engine wiring harnesses, so it's advisable to regularly clean the engine compartment dust to prevent this issue. For safety, I'd remind you not to keep trying to start the car if it won't fire up, to avoid draining the battery. Calling a tow truck to take it to a professional shop is more reliable. Paying attention to these details regularly can save a lot of repair costs and time.
I'm a regular on car forums, and there's a lot of discussion on such issues. The lack of high-voltage spark in the Jianghuai Refine is mainly due to ignition system failures. Common causes include the ignition coil not outputting current, open circuits in the high-voltage wires, or spark plugs being flooded with oil. Additionally, issues with control units like the ECU module malfunctioning or loss of signal from the camshaft sensor can also prevent the engine from igniting. From personal experience, don't mess around blindly—start by replacing and testing the spark plugs. If that doesn't work, check if the main fuse box is blown, located on the right side of the engine bay. If you're not familiar with circuits, don't dig too deep; using a diagnostic tool to check for fault codes is the most straightforward approach. By the way, during maintenance, applying anti-oxidation spray to the connection points can extend their lifespan and prevent future breakdowns, making your trips more worry-free.
