What are the reasons why the electronically controlled engine cannot start normally?

The first step is to spray an appropriate amount of carburetor cleaner into the air compartment to see if the car can be hit. If you are able to get into the car, check the oil circuit. (including oil pumps, filter cartridges, fuel injectors, fuel injector wiring harnesses).

Step 2, If it can't start, remove the spark plug, look at the ignition, if there is a fire, replace the spark plug and try again.

Step 3: If there is no fire in the spark plug, please check the EFI fuse in the fuse box first, and replace it if the fuse is damaged.

Step 4: If there is no spark after the change, check the crankshaft position sensor. If the crankshaft position sensor is normal, check the trip computer.

1.Check the wiring carefully to see if there is a short circuit, leakage, or a piston fault.

Hello According to your description, component breakdown failures often lead to short circuits, which are generally caused by the internal voltage of the engine exceeding normal values or the engine overheating at continuous high-speed operation. If the capacitor or transistor and other components in the engine break down and there is a short circuit, it is easy to cause the ignition system failure of the automobile engine, and it is very easy to fail to start.

For reference, 1. Sensor failure; 2. The quality of gasoline is not up to standard; 3. The air leakage of the inlet pipe leads to the mixture being too thin; 4. The fuel pressure is low, and the injector and fuel filter are blocked; 5. The signal of the pressure sensor and the throttle position sensor is abnormal; 6. The signal of the sensing liquid tank device is abnormal, resulting in inaccurate ignition timing and late ignition; 7. Weak high-voltage sparks due to poor spark plugs, igniters or high-voltage wires; 8. The throttle is dirty; 9. The exhaust gas recirculation system works poorly; 10. The exhaust pipe is blocked; 11. The cylinder pressure is low; 12. Turbocharging system failure 13. Clutch three-piece set 14 Air filter blockage, piston ring break or stuck, poor valve sealing, late ignition time, carburetor mechanical failure, air intake pipe leakage, individual cylinders do not work well or do not work, etc. However, some of the faults of insufficient engine power can be solved by use. Such as:

The general wear of the cylinder is high, and the flow of the carburetor oil channel is not smooth. When the user reflects that the engine power is insufficient, when the oil is burned, we should first judge the cause of the lack of power, in the exclusion of the air filter blockage, the carburetor throttle can not be fully opened, the ignition timing is not good, the intake pipe gasket is damaged, the individual cylinder does not work or does not work well, and then according to whether the engine fuel consumption is too high to judge the carburetor working condition, if the fuel consumption is too high, the exhaust smoke is very thick, it is likely that there is a mechanical failure such as the volume hole falling off, this fault must be repaired as necessary. Finally, we have to judge the wear and tear of the engine cylinders.

Engine wear directly affects the tightness of the cylinder; The most convenient way to check the tightness of the cylinder is to use a cylinder pressure gauge to check the compression pressure of the cylinder.

When everything is in order with the engine, a faulty starter or battery can make it difficult to start the engine, or even not start. In this case, it is necessary to first understand the limb signal usage of the starter and the battery, so as to roughly determine the fault location. If the battery has been used for more than 1 year, its technical condition should be checked; If the battery has been used for a short time, and the starter has not been overhauled for a long time, it should be checked from the starter.

Reason 1, when starting, only the "gurgling" sound of the electromagnetic switch of the starter is heard, or the starter drives the crankshaft to rotate slowly a few times when starting for the first time, and then the "gurgle" sound of the starting electromagnetic switch appears, but the crankshaft does not rotate. This phenomenon is generally a battery "broken" fault. Reason 2: Temporary parking can be started every time, but when the parking time is long or the next day is started, the crankshaft can only be rotated.

This phenomenon belongs to the serious self-discharge of the battery, and its plates and separators are seriously aged, indicating that the battery is close to being scrapped. Reason 3: The starter suddenly rotates weakly when starting, and is accompanied by the smell of burning rubber or smoke coming out of the battery.

The quality of gasoline is poor and not up to standard;

Oxygen sensing refers to artifact failure;

Faulty air flow sensor;

carbon deposition in spark plugs;

If the commotion is launched, the leather shed of the machine will detonate;

The water temperature sensor is damaged;

The high-pressure oil pump was damaged, resulting in a lack of cylinders in the engine.

There are many reasons for this situation, and it is necessary to investigate it gradually, first of all, to return to the Qin circuit Zhaoshi Ying, to see if there is a reaction to the power-on, and then check the oil circuit, see if the gasoline pump, fuel injector, and spark plug are normal. Check the air intake, and see if the throttle and other components are normal.

It is very likely that the battery is dead, causing the engine to not start, or it is possible that there is a lack of fuel, and it will also cause the engine to not start.

The fault of the animal machine can not be started, generally speaking, the battery of the car is seriously damaged, you can check it, when starting, the light is not obviously dimmed, if so, replace the battery.

It can be that the battery has insufficient power storage, the electrode pile clamp is loose or the electrode pile is seriously oxidized.

If the engine cannot be started, check whether the battery is losing power, whether the starter is working, the ignition system, the fuel system, and the intake and exhaust system are all affected.

There are many reasons why the vehicle may not start. If you are driving in the morning and the engine of your vehicle does not start properly or is not in a hurry, please check each one below. The car will not start without gasoline, but this phenomenon usually does not occur, but sometimes it cannot be started even if there is oil, it is usually a problem with the gasoline pump, and the lack of pressure of the gasoline pump will cause the engine to start difficult.

There was a problem with the gasoline pump, so I had to go to the repair station to check it. When starting, you can only hear the "gurgle" sound of the starter solenoid switch, and then hear the "cluck" sound of starting the solenoid switch, but the crankshaft does not rotate. This phenomenon is usually a battery "breakage" defect.

When stopping for a long time or starting the next day, only the crankshaft can be turned. This phenomenon indicates that the battery itself is seriously discharged, the plates and separators are seriously aged, and the battery is close to being scrapped. If the start switch is turned to the starting position, the engine will not start and nothing else.

This failure is when the key and switch are not connected to the starting circuit due to wear and tear. Secondly, the starter relay is not connected to the starter electromagnetic switching circuit. The power switch is not connected to the main circuit.

Everyone knows that spark plugs work on the principle of high voltage discharge. When the pulsed high-voltage electricity generated by the ignition coil is transmitted to the spark electrode, the high-voltage electricity breaks down the gas mixture, producing this spark and allowing the engine to work properly. It can be said to be one of the most important parts in a car.

Temporary parking can be started every time, but only the crankshaft can be turned when the parking is long or when it starts the next day. This phenomenon indicates that the battery itself is seriously discharged, the plates and separators are seriously aged, and the battery is close to being scrapped. The starter suddenly weakened, the smell of rubber or the smoke from the battery, most of them were caused by poor contact between polar and polar pliers, resulting in heating.

There are two reasons why the starter drive gear makes an idling sound that collides with the engine flywheel ring gear. One is the meshing cut deformation of the flywheel gear ring. The gap between the starter drive gear and the flywheel ring is too large.

The two can't mesh, and the engine can't start. As soon as the main switch of the power supply is opened, the starter drive gear is engaged with the flywheel ring gear and rotates. Such a malfunction occurred.

One is that the holding coil of the starter solenoid switch is incorrectly connected to the power terminal. When in the "0" position, the starter drive gear does not rotate, and when it is in the "2" position, the judgment that the starter motor drive gear and the flywheel gear ring mesh rotate, and the three wires of the key switch are not connected correctly.

If the start switch is turned to the starting position, the engine will not start and nothing else. This failure is when the key and switch are not connected to the starting circuit due to wear and tear. Secondly, the starter relay is not connected to the starter electromagnetic switching circuit.

The power switch is not connected to the main circuit. There was only a slight "click" sound when it started, and there was no further reaction. This is because of the issuance of a starter relay card.

At this time, as long as the tail of the electromagnet is pressed, the electromagnet moves forward, and the starting circuit can be connected to make the engine run. European and American trolley white racing bulbs have become the only choice for many RV owners.

It is very likely that the battery is dead, because it is difficult to start the engine when the car battery is out of power.

The reason why the engine does not start properly is that the battery is insufficient and the starter is faulty. The valve is not closed tightly, so the injected gasoline cannot be adsorbed and enters the combustion chamber. There is a malfunction in engine management.

There was a malfunction in the ignition system. There is a fault in the oil supply system. All of these problems are the causes of the engine not starting properly.

The reason why the engine does not start properly may be caused by too much carbon deposits in the engine. It is recommended to go to a professional auto repair shop for inspection and repair.