James Smith        October 27, 2020

Speaking of car with electronic fuel injection, maybe a layman can tell one or two of its advantages, such as energy saving, environmental protection and so on. With the popularization of electronic fuel injection, some of its special faults also follow, the most typical is the symptom of carbon deposit. Carbon deposit can generate in valve, combustion chamber and intake pipe 1. Carbon deposit in valves and combustion chamber The characteristics of the engine with electronic fuel injection determine the ignition, injects the air- fuel mixture, then ignites. When we turn off the engine, the ignition is cut off immediately, but the working cycle has done, the useless fuel will exist. Due to volatilization of gasoline, some substance (wax and gel)will stay on inlet valve and combustion chamber wall and harden after repeated heating, carbon deposit has generated over time. If the engine burns oil, or the gasoline is filled with low quality impurities, the valve will accumulate more carbon and form more quickly.

James Smith        October 22, 2020

Most of us encountered such a problem in the driving process, the car engine shakes while idling, and idling speed up to 950 RPM. We got into the panic. Generally, it is not a big issue, we just need to figure out what causes lead to this symptom. In fact, there are several reasons for this symptom, roughly divided into three main reasons: engine misfire, excessive carbon deposition of throttle, excessive pressure fluctuation of fuel system.

James Smith        July 30, 2020

Distributor is a part of the ignition system, which can control the switch of the primary circuit and distribute the spark to the spark plug of each cylinder in order. The distributor is mainly used in the conventional ignition system and the common electronic ignition system, but these two ignition systems have been basically eliminated. Now the automobile engine eliminate the distributor. Working principle of distributor In the battery ignition system, the distributor and the breaker are usually on the same shaft and driven by the valve camshaft. It also has ignition advance angle adjustment device and capacitor, etc. Breaker arm in distributor closes the contact with a spring leaf and opens the contact with breaker cam. The opening clearance is about 0.30~0.45 mm. The number of bulge in breaker cam is the same as the number of cylinders.

James Smith        July 29, 2020

The ignition system is a key part for car, which is also the source of many faults. If we went to troubleshoot problems, we must be in-depth analysis and to explore the ignition system fault diagnosis and maintenance. Taking Toyota Corolla ignition system as the analysis object, explore its fault diagnosis and maintenance , hope to help maintenance technicians to repair ignition system problems.

James Smith        July 27, 2020

We'll start with the ignition system for gasoline cars, and logically break the content of ignition system down into easy to read chunks. With the development of automobile technology, the ignition system is basically divided into traditional ignition system and electronic ignition system. In fact, these two ignition system are still used in automobiles. The two ignition system work on roughly the same principle and operate in the same circuit. The only difference is whether the type of ignition is mechanical or computerized.

James Smith        July 27, 2020

Check engine light different from other warning light on the dashboard such as oil level light, water temperature light. If check engine light is on, the problem is much more complex. Check engine light is also a common problem, If check engine light comes on suddenly while driving, can I continue to drive? This is a very difficult question, because check engine light, the problem can be severe or mild. Even no problem also can be detected \"false failure\", and another phenomenon is that check engine light occasionally is on or off. In fact, this false failure is also very easy to understand, indicates the fuel is not up to fuel standard, or the oil is poor quality. Other problems (such as carbon deposition) caused by insufficient mixture combustion can illuminate engine warning light. Fuse and some of the sensor circuit is poor contact by vibration when a car is running, which also lead to check engine light on occasionally.

James Smith        July 26, 2020

The crankshaft position sensor (CKP) and camshaft position sensor (CMP) are tested normally, but there is no high voltage spark, and usually power leads of the ignition coil assembly are broken. (1) Test with high-impedance multimeter and light-emitting diode: For vehicles without distributor, first unplug the primary winding plug of 4-channel ignition coil and test 3 ~ 4 connector pin with high-impedance multimeter with voltage no less than 11 V.

James Smith        July 24, 2020

The common faults of ignition coil are: Damaged by external forces and burnt due to excessive current. If the ignition coil is damaged, the ignition system will not work and the engine will not be able to start. Another fault is inevitable, which is caused by the aging of ignition coil. The ignition coil fails in several situations 1. An individual cylinder does not work without spark, lead to shake at idle and poor acceleration when refueling. 2. The electrical leakage of ignition coil, idling engine wobble sometimes have or sometimes not, but poor acceleration when refueling 3. When accelerating，sometimes resulting in engine wobble because the electricity supply has been cut off. 4. If the ignition coil has a fault, the car doesn’t start.

James Smith        July 24, 2020

Ignition coil plays an irreplaceable role in the engine. So what are the symptoms if ignition coil has a fault? Can l drive when my car has a faulty ignition coil? How can I know ignition coil is faulty? A faulty ignition coil can lead my car to more fuel consumption and less power? We will discuss these questions in this article. Fault analysis of ignition coil The fault indicator light is on, and the fault code shows that there is a misfire. The car does shut off suddenly when driving, but it can start normally soon after flameout. The test result shows the resistance of the terminal connection between the ignition module and ignition coil was completely normal.

James Smith        July 23, 2020

The magnetic conductivity of the core is about 10,000 times that of the air. Therefore, if the ignition coil with open magnetic circuit wants to obtain the same magnetic flux as the ignition coil with closed magnetic circuit, the primary winding must have a large magneto motive force (ampere turns).