Mercedes ml350 missing casks, not necessarily spark plugs. It uses a stand-alone ignition structure, with a single ignition ring for each cylinder; single ageing, broken or short circuits, with no high voltage charge to deliver spark plugs, and this tank cannot be lit, with a malfunctioning light, a car shaking, and an inability to accelerate。
In the region of gincheon, after many years of use, motor shaking and failure lights are common. Ginkawa was exposed to a large number of mercedes, bmw, odivyberg cases, and this mercedes ml 350 lack of tank failure is typical。
Many mercedes ml350 owners have encountered: sudden engine shaking, power drops, flashlights on dashboards, and reading fault codes suggesting engine failure. The first reaction was the ageing of spark plugs, which continued to fail after self-replace and repeatedly found no source。
I. The role of the lit wire
The internal combustion engine does not fail to fire the hybrid gas. The output voltage of a vehicle-mounted battery is only 12v, which is far from sufficient to pierce the spark plug electrodes and to ignite the gas mixture in the tank. The ignition ring is essentially a pressurizer, which converts 12v low volts into an all-volt high-voltage moment, delivers to spark plugs, produces sparks, detonates the compressed fuel mix inside the cylinder, drives the engine to work。
Benz ml350 uses a stand-alone ignition structure, each cylinder is equipped with a single ignition ring and is installed directly above the spark plug. The design is efficient and responsive, and the fuse ring of a cylinder is damaged and does not directly cause the vehicle to completely shut down. Shortboards are also visible: in a long-term high temperature environment, the probability of the ageing of a single ring rises with a mileage, i. E., single-point failure, which directly triggers a lack of a tank for the engine。
Ignition wire damage. Why is the tank missing
The engine is short of a tank, with the simple understanding that one or more of the six cylinders cannot function normally。
When the insulation of an insulation layer inside a jar is old, the circuit is broken or short circuits are short, the high voltage charge cannot normally reach the spark plug. The fuel mix of the tank was not lit by electric sparks, and it lost its ability to function, i. E., its lack。
The remaining well-functioning cylinders are still working and the engine is not functioning in a balanced manner, with the most intuitive changes in the body, the inability to accelerate and the slowness of the oil-gate response. Unfired gasoline will flow directly into the triple catalyst, burning inside the catalyst at high temperatures, which will easily result in a three-dollar catalytic overheat burning and a doubling of maintenance costs。
The damage to the ignition wires is often induced by the continued high temperature and aging of the engine compartment: a compact layout of the mercedes ml350 engine module, with a concentration of heat during operation. The insulation of internal epoxy resins is slowly aging, cracking, decreasing insulation and high voltage. Cold vehicle symptoms are minor, heater temperatures are higher, power leaks are higher and the lack of tanks is more pronounced. The spark plugs have been unreplaced for a long time, with a focus on the ring load: the gap between the pyroclastic poles has grown larger with the use of wear and tear, and higher voltage is required for the ignition ring to break through the gap. Long-term overloading will accelerate internal damage to the firing ring. Many of the drivers ignored the spark plug maintenance and waited for the tank to be repaired, at which point the fusering was often damaged. Oil leaking impregnated filament rings: gas chamber lids are old filtration oil, and oil flows through the gap to the location of the ignition ring. The oil is conductive, corrosive and embezzled by the firering rubber seal and internal circuits, resulting in high voltage leakage. It's also a very high incentive for mercedes ml 350. Lines, plugs, oxidation of water: wind sand in engine compartments, erosion of water vapours, oxidation of metal needles, corrosion, failure of wire rings, unstable high-pressure power supply, intermittent failure, occasional failure, and greater difficulty of screening. 3. The failure typically manifests a clear start-up vibrating effect of the cold vehicle, which is slightly reduced after the heat vehicle; the impotence of the speed of the journey, the boredom of the oil pedal, and the sudden acceleration of setbacks and break-ins; and the failure of the engine lights, with some of the failure lights flashing. Screeching represents a serious shortage of casks, and it is recommended that the speed of the vehicle be reduced immediately so that it does not continue to move; it is clear that the detour is shaking, the hood is opened and the engine is running slowly; and the fuel consumption is unknown and the tail gas can smell visible gasoline。
Important reminder: if engine failure lights flash, which represent a serious shortage of current tanks, uncombusted fuel is being triggered by a three-dollar shock, it is not recommended to continue at long distances and stop and repair as soon as possible。
Standard testing process, precise location of missing cylinders
Many workshops encounter vibrations, faillights, and come up with a set of replacement ignition rings and spark plugs, which are typically over-maintenance. Earlier, a local mercedes ml350 owner, faced engine failure lights flashing, glitching, a simple replacement of spark plugs continued to fail, fearing serious mechanical damage to the engine, came to silvergawa for systematic testing。
Instead of recommending the replacement of spare parts directly, the technicians strictly applied standard testing steps:
Step 1: connect to a specialized engine diagnostic computer, read the failure code and lock the fire to the cylinder number。
Step 2: conducting a fire wire exchange test. Switch the ignition loops of the reporting cylinders and those of the normal cylinders, remove the failure code and test the vehicle. The failure code was subsequently transferred to confirm that the fusering itself was damaged。
Step three: check the look and plugs in the ignition ring. Remove a fuse ring to see if the rubber skin is fractured, seepage traces, and the needle foot is corrosive and oxidized。
Step 4: check the pyrotechnic state, check electrode wear, carbon accumulation, oil pollution, and simultaneously measure the pyrotechnic gap。
Step 5: measuring gas tank pressure and eliminating fire caused by mechanical malfunctions such as gas doors, pistons, etc., if necessary。
Through this complete testing process, the cause of the failure is precisely identified, distinguishing between the problem of firing wires, the problem of spark plugs, and other malfunctions, such as spray oil, tank pressure, etc. The final determination was that the single-firing ring had failed and that the rest of the ignition system was in good condition。
V. A stand-alone failure ring replacement or a full set of replacements for replacement points for maintenance? The tests confirmed that only single fire wires had been damaged, that the remaining wires were in good condition and had low mileage, and that the technicians had recommended that only the damaged one should be replaced without the need for a full replacement to save unnecessary spare parts costs. If vehicle mileage is high and there are signs of ageing of the remaining ignition rings, the full replacement is recommended. Because of the damage caused by the fire wire ring that worked under the same conditions, the remaining rate is likely to be near the end of life, avoiding a further shortage of casks in the short term and repeated dismantling. Accompanying inspection of spark plugs: the technicians simultaneously check the spark plugs when replacing the ignition ring. If the spark plug has reached the replacement cycle and the electrodes have suffered severe wear and tear, it is replaced. The well-equipped spark plugs of the new coil reduce the risk of reloading damage. This time, the ml350 spark plug is worn to a good degree and will be used after cleaning the gap. Cleaning and sealing: cleaning up the leaked engine oil from the gas chamber roof, checking the gas chamber lid state, preventing the oil from again immersing in new ignition wires, causing secondary damage. Plug-in for clean removal and installation. Once replacement is completed, the failure code is cleared and the road test is reviewed: the spare parts are installed, the storage code is cleared with a diagnostic computer, the road test is tested, the engine data flow is observed on a continuous basis to confirm that there is no further fire recording and that the failure speed is smooth and normality is accelerated before maintenance is completed. When the vehicle was delivered, the technician also explained the follow-up vehicle to the owner, alerting him to the ignition system. Vi. Recommendations for routine vehicle maintenance
In the ginchon region, the temperature varies widely by day and by night, with wind and sand, and the rate of aging of the rubber parts and electronic components of the engine compartment will be faster. A lot of mercedes ml350 owners have problems with the ignition system. Regular engine routine tests are performed and maintenance can be carried out with an accompanying view of the ignition system state. Replacement of spark plugs in accordance with the plant's established cycle, without indefinite extension. The engine is usually slow, and if it is found that it is shaking and the power is changing, it is checked in as early as possible. Small fires are difficult to detect at an early stage and continue with disease, not only exacerbating the damage to the ignition system, but the cost of maintenance increases significantly when expensive tri-dollar catalyticization is damaged. The core of maintenance is always to identify the cause of the failure and to develop a maintenance programme based on the actual condition of the vehicle, so that individual repairs are not always replaced. If you have problems with this kind of engine, you can also go to shinseng tung dong road at the deutsche industrial park and ask a technician for a professional test。
