What are the reasons for difficulty in starting a gasoline engine?
3 Answers
Difficulty in starting a gasoline engine may be due to spark plug issues. After each use, turning off the fuel switch and letting it burn off the remaining fuel before shutting down can help prevent carburetor damage. Gasoline engines are characterized by high rotational speed, simple structure, light weight, low cost, smooth operation, and ease of maintenance and repair. They are widely used in automobiles, especially in small cars. Relevant information about gasoline is as follows: 1. Introduction: Gasoline is a volatile, flammable hydrocarbon mixture liquid obtained from petroleum through distillation and cracking, used as fuel. It appears as a transparent liquid, is flammable, and has a distillation range of 30°C to 220°C. 2. Important Characteristics: The important characteristics of gasoline include volatility, stability, anti-knock properties, corrosiveness, and cleanliness.
Last time my car was also hard to start, and after checking for a long time, it turned out to be an aging battery. It's especially noticeable in winter when temperatures are low, as insufficient voltage can't spark the engine. Another reason was insufficient fuel pump pressure, where impurities in the fuel line clogged the injectors, causing poor fuel supply. Excessive carbon buildup on the spark plugs is also something to watch out for, as it affects ignition efficiency. During the last maintenance, severe carbon buildup was found in the intake system, disrupting the air-fuel ratio during cold starts. The most troublesome issue was a sensor failure; when the camshaft position sensor broke, the ECU couldn't receive signals. Another lesson was not replacing the fuel filter on time, allowing dirt to block fuel flow. Corrosion on the battery terminals can also have an impact, but sanding them down helped a lot.
When repairing cars, it's common to encounter vehicles with starting difficulties. First, listen to the starter sound: if there's no response, it's likely due to loose battery terminals or a dead battery; if the starter turns but the engine doesn't start, check the fuel pressure gauge to test the fuel pump. Common issues include: carbon buildup in the fuel injectors leading to poor atomization, excessive spark plug electrode erosion with large gaps, and drifting data from the intake pressure sensor affecting the air-fuel ratio. Older cars are prone to incorrect ignition due to timing belt misalignment. Also, check the fuel quality—gasoline with too many impurities can clog the filter. A stuck idle control valve can also cause starting difficulties. A failed crankshaft position sensor is more troublesome, as the ECU won't receive the RPM signal and thus won't inject fuel.
