Why can't a hot car start? Analysis of hot topics on the Internet in the past 10 days
Recently, the issue of "hot car not igniting" has become a hot topic of discussion among car owners. Many netizens reported that the vehicle stalled in a high temperature environment or after driving for a long time, and had difficulty starting again. This article will analyze the common causes of this problem based on the hot discussions on the Internet in the past 10 days, and provide structured data to help car owners quickly troubleshoot faults.
1. Common reasons why a hot car cannot ignite
According to car repair forums and social media discussions, hot car starting difficulties are usually related to the following 6 types of problems:
| Fault type | Specific performance | Proportion (sampled data) |
|---|---|---|
| fuel system problems | Clogged fuel injector/insufficient fuel pump pressure | 32% |
| Ignition system failure | Spark plug carbon deposit/ignition coil aging | 28% |
| Sensor abnormality | Water temperature sensor/crankshaft position sensor failure | 18% |
| Air intake system problems | Throttle valve carbon deposit/air filter clogged | 12% |
| Battery and circuit problems | Battery loss/poor circuit contact | 7% |
| Other mechanical failures | Insufficient cylinder pressure/timing belt misalignment | 3% |
2. In-depth analysis of key issues
1. Fuel system problems
Recently under the topic #carmaintenance on Douyin, many technicians pointed out that high temperatures in summer will cause fuel to vaporize more easily. If the fuel pump pressure is insufficient (the normal value should be maintained at 2.5-3.5bar), "air lock" will occur. It is recommended to check the fuel pressure regulator and filter.
2. Ignition system failure
Zhihu hot posts show that spark plugs may experience "thermal decay" under high temperature conditions, especially nickel alloy spark plugs. Latest survey data:
| Spark plug type | average life span | Hot car failure probability |
|---|---|---|
| Nickel alloy | 20,000-30,000 kilometers | 17% |
| platinum | 40,000-60,000 kilometers | 9% |
| Iridium | 80,000-100,000 kilometers | 4% |
3. Sensor failure
Weibo automotive celebrity @老driver’s actual measurement found that a faulty water temperature sensor would cause the ECU to misjudge the cold start state and cause the fuel injection amount to be too rich. Typical symptoms: Black smoke comes out of the exhaust pipe when the car is started hot.
3. Self-examination guide for car owners
According to the "Summer Automobile Failure Self-Examination Manual" released by Toutiao today, a preliminary judgment can be made through the following steps:
1. Observe the fault lights on the dashboard (especially the yellow engine light)
2. After the car is warmed up and turned off, restart it immediately and listen to the starter sound.
3. Check if there is any fuel smell (no operation is allowed when oil leakage is suspected)
4. Use an OBD detector to read fault codes (recent JD.com data shows that OBD tool sales increased by 40% month-on-month)
4. Maintenance suggestions
Baidu Tieba's "Car Repair" bar poll shows that the proportion of measures taken by car owners to deal with hot car starting problems is:
| Maintenance method | Select scale | average cost |
|---|---|---|
| Replace spark plug | 45% | 200-400 yuan |
| Clean oil circuit | 30% | 150-300 yuan |
| Replace sensor | 15% | 300-800 yuan |
| Other major repairs | 10% | More than 1,000 yuan |
5. Preventive measures
Special suggestions for summer car maintenance from the car-savvy emperor:
1. Replace the fuel filter regularly (every 20,000 kilometers)
2. Use gasoline that meets the label
3. Avoid direct sunlight on the fuel tank when parking.
4. Older vehicles can be retrofitted with cooling devices
If the problem persists, be sure to contact a professional maintenance agency for inspection in time to avoid causing a larger failure. Recent data from the China Automobile Maintenance Association shows that the number of engine overhaul cases caused by delayed repairs due to hot-start problems has increased by 15% year-on-year.
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