你正在路上驾驶，你的车辆表现良好。它可能是犹豫或溅射，但它通常被称为失火。什么是失火？我们将查看导致此引擎性能问题的原因以及您可以做些什么来解决它。乐动官方网址
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发动机失火的常见原因
磨损或有缺陷的火花塞
空气燃料比率不平衡
In the engine, air and fuel are mixed together. This mixture is ignited by the spark plugs to create an explosion that keeps the engine running. If there is an issue with this air/fuel ratio, you might experience a misfire. The most common causes for imbalance include a vacuum leak or defective fuel injector.
缺乏压缩
任何发动机机械问题都可以导致失火，特别是当它涉及圆筒时。对于适当的压缩来保持密封的气缸至关重要。因此，如果您的车辆遭受头部垫圈问题或泄漏阀门，则压缩将关闭，导致失火。
Emissions equipment issues
排放设备进一步配合空气/燃料混合物，具有导致失火的故障。麻烦可以源于正曲轴通风（PCV）系统或废气再循环（EGR）系统的问题。
传感器和模块问题
Modern vehicles are filled with sensors for every system. However, there are some working directly with the PCM, determining some of the most critical functions, including spark timing and fuel delivery. If one sensor malfunctions, an engine misfire can follow. Sometimes, even a faulty PCM can cause your problems.
受损控制电路
The vital components of your vehicle, such as the ignition coil packs and sensors, all connect through electrical circuits. If there is a fault in one of the circuits, you might notice an engine misfire. It could be something as simple as a loose connection or damaged wiring.
发动机失火的迹象
粗糙的空闲
Many people start to wonder - what is a misfire in a car – when it begins to idle roughly. This is a surefire sign that something is wrong with the fuel or ignition system. If you are sitting at the stoplight and notice the engine running poorly, you likely are dealing with a misfire.
Rough/Poor acceleration
If the car jerks when you accelerate or seems to lack power, this is another sign. When the air/fuel mixture isn’t right, the acceleration suffers. It can also lead to severe performance issues, leaving you wondering if you will even make it home.
振动和发动机噪音
您的骑行应该是愉快的，没有充满剧烈的振动或响亮的发动机声音。然而，这正是在处理发动机失火时发生的事情。有时，由于通过排气系统推出的未燃烧燃料，发生了反馈声音。
Check engine light
如果你的检查发动机灯comes on, you know that something isn’t right. While this light doesn’t tell you what the problem is, it does alert you that something is wrong. What is a misfire code? It is a trouble code that can be read with a scan tool, giving you a better idea of what’s wrong.
发动机停滞
We already discussed how the misfire could create performance issues, but in extreme cases, it can also lead the engine to stall. There’s nothing enjoyable about getting stranded in the middle of the road with a vehicle that stops running.
Gasoline Smell
当发动机失火时，它可以导致您的汽车中的汽油气味。无论您是嗅到汽油还是让人想起防冻剂的甜味，都很重要，您将立即查看您的车辆。
Unusual Exhaust
什么是气缸失火以及它如何与排气系统相关？随时发动机误兵，它可能导致燃料不正确燃烧，这导致更耗尽的烟雾。您可能会注意到车辆后面的深黑色排气云。
如何诊断失败
想想发生发动机失火的场景
什么是误兵引擎和导致它的原因是什么？这就是你想要弄清楚的。首先做出关于发生的事情的说明。当发动机冷却时才会发生失火是否发生了，或者当它被加热时？在加速期间或随时驾驶时，这种麻烦是否发生？这些是您继续诊断失火的重要因素。
使用扫描工具
你可以使用一个engine code scannerto hunt down the issue. Ideally, you want one that graphs data, so you can tell what cylinder is misfiring. If you don’t have a scan tool, you can visit many auto parts stores for a free scan.
检查火花塞和点火线圈
With a graphing scan tool, you will pinpoint which cylinder is giving you trouble. This is the cylinder you want to check the spark plug or ignition coil for trouble. If you don’t have a graphing scan tool, you will need to test each cylinder by swapping out these parts individually. There isn’t much difference between learning what is a cylinder 3 misfire versus what is a cylinder 1 misfire, other than where it is occurring.
检查燃油系统
You will have to do a full check of the fuel system and injectors if nothing else seems to cause the problems. However, some engine scan tools will also pinpoint these problems, such as a faulty O2 sensor.
检查真空系统
如果已检查其他所有内容，则要查看真空系统。执行气缸泄漏和压缩测试时，您需要专门的工具。在这些情况下，您可能更愿意访问合格的技工。
如何修复汽车失火：专家指南
如果你have an engine misfire or engine codes P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, or P0308, you will want to follow these steps for repair.
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1寻找检查发动机灯。使用OBDII扫描仪阅读代码并修复问题。
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2Check cylinder temperatures. If you have aninfrared temperature gun, you can check the cylinder temperatures. Scan the port that comes out of the exhaust manifold from each cylinder. If one is significantly cooler than another, it might not be firing. Of course, this only works if the engine is currently misfiring, not if it is sporadic.
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3修复任何真空泄漏。如果有一个破碎的真空线，则要立即更换它。
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4更换有故障的燃油喷射器。使用测试灯，您可以检查每个燃油喷射器。如果光线亮起，有电力进入喷射器。但是，您将希望替换任何缺乏权力的任何缺乏权力或寻找它的基本原因，为什么无法获得权力。您还可以使用一些方法清理系统燃料喷射器清洁器添加到下一个罐中。
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5如果误差表示故障O2或大规模气流传感器，请更换。
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6如果需要，请检查火花塞并更换它们。这是一个常规的维护任务，应该在预定期间执行调高。
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7Perform a compression test and repair any issues you find, such as replacing a head gasket.
如果所有其他人失败，可能是时候访问当地的机械师了。
人们也问（常见问题）
如何避免发动机错误？
为避免所有引擎性能问题，您乐动官方网址希望执行定期调整。遵循所有者手册中概述的推荐维护计划。
Can I drive with an engine misfire?
随着汽车问题驾驶，尤其是导致您的汽车摊位或溅射的速度永远不会明智，让您容易受到事故。此外，延长必要的维修只会导致更多的损坏和昂贵的道路维修。
Will the injector cleaner fix a misfire?
如果你have a clogged fuel injector causing problems, a fuel injector cleaner might solve the problem. Otherwise, it will do nothing to repair other causes such as compression concerns or a faulty spark plug.
Will a tune-up fix a misfire?
It can repair a misfire if the trouble is caused by a faulty spark plug or other component swapped during the tune-up.
在机械店修复失火多少钱？
It depends on what is causing the problem. Swapping out a spark plug will cost far less than getting a head gasket replacement.
结论
什么是失火？It's the lag, or lack of acceleration felt when something is malfunctioning in the vehicle engine. All trouble can be serious and should be looked at right away. Follow our steps to gain a smooth ride once again.