Causes & Corrections When The Engine Has A Reverse Explosion

Cause &Amp; How to Repair an Engine Backfire High-end Garage Thanh Phong Auto Hcm 2024
Latest update date: February 07, 09

Cars are a very important vehicle when participating in traffic of many people. Therefore, cars need to be preserved and taken good care of in order to keep their value and be more sustainable. 

However, after a period of use, there will be times when your "driver" is damaged, so you need to pay more attention to maintenance to keep it in the best state.

In case if you are using a car and detect unusual sounds from the engine, Thanh Phong Auto is definitely one of the signs your "driver" is damaged.

There are many reasons why your car engine emits different abnormal sounds. The following article Thanh Phong Auto Please introduce to you the causes, how to check and repair if the engine of the car explodes. Stay tuned!

1. The cause of the reverse explosion phenomenon

Cause &Amp; How to Repair an Engine Backfire High-end Garage Thanh Phong Auto Hcm 2024

Reverse explosion has two types:

First: Explosions are emitted from the filling pipe. The reason is that the fuel mixture feeding line was burned. When this reverse explosion occurs, the plastic intake line may be broken, or the throttle may be damaged. If the intake pipe is made of aluminum, when this happens it will be less damaged than the plastic intake pipe.

Monday: The explosion comes from the car exhaust pipe. Some causes of this phenomenon include:

  • Due to damage to the pressure regulator valve assembly.
  • Due to damage of injector parts.
  • Due to damage of ignition system parts.

2. Reverse explosion phenomenon on the intake pipeline

Step 1: Lamp "check engine"

Cause &Amp; How to Repair an Engine Backfire High-end Garage Thanh Phong Auto Hcm 2024

The "check engine" light will light up to alert you if your "driver" happens to reverse explosion. At this point, to be able to detect the error code is happening, you need to use a diagnostic machine to connect to the vehicle. In addition, you also need to follow the steps if there is no warning light.

Step 2: Check the pressure of the fuel system

In cars, the fuel system will be designed to operate at constant fuel pressure. Therefore, the cause of poor air mixture leading to engine explosion is due to reduced fuel pressure. 

Cause &Amp; How to Repair an Engine Backfire High-end Garage Thanh Phong Auto Hcm 2024

Some reasons for the decrease in fuel pressure include:

  • The fuel filter is clogged.
  • Missed fuel pump.
  • There is a problem with the regulator.

Therefore, the best way is to conduct a fuel pressure test to be able to know the current status of the fuel system.

To be able to check, we first need to determine the location of the fuel pressure test, then while the engine is in operation, put the fuel pressure gauge in and start reading the value. its.

Oto Engine Troubleshooting Based on Phenomenon, Operating Status

Step 3: Maintenance, replacement of intake air intake sensor MAF

On current new vehicles, the computer system will adopt the MAF sensor signal to control the amount of fuel entering the engine.

Cause &Amp; How to Repair an Engine Backfire High-end Garage Thanh Phong Auto Hcm 2024

After the operation time, the drying wires on the sensor will no longer work correctly due to dirt, so that some wrong signals will be sent to ECU. At this point, ECU will understand that there is very little air in the engine, meaning that the fuel mixture or the poor air mixture due to ECU control fuel injection is small.

Therefore, if you feel that the sensor is damaged, you need to remove the MAF sensor. Also use the carburetor cleaning solution to clean it or you even need to replace the MAF sensor if necessary. 

Step 4: Carry out inspection of intake pipes

Reverse explosion may occur due to a torn or punctured intake manifold, resulting in less air entering the engine. This leads to a poor fuel or air mixture. Therefore, at this time you need to check or replace the intake pipe if necessary.

Step 5: Check the vacuum leak phenomenon

Cause &Amp; How to Repair an Engine Backfire High-end Garage Thanh Phong Auto Hcm 2024

Vacuum leakage is likely to occur at the junction between the brake assist brake and the vacuum pipe. At this time, in the charging pipeline, reverse explosion may occur and cause:

  • Idle motor is not stable.
  • Brake pedal is heavier.

To detect leaks you can use carburetor cleaning solution or RP7.

Step 6: Conduct the ignition system test

Cause &Amp; How to Repair an Engine Backfire High-end Garage Thanh Phong Auto Hcm 2024

In the car, the ignition system will work at a certain current and voltage. The case of sudden increase in electric current or voltage due to wrong adjustment or failure may also cause a reverse explosion on the intake manifold.

Some causes for surge voltage or amperage:

  • Ignition angle adjustment incorrect.
  • Damaged power divider.
  • Worn spark plugs.

Step 7: Check the camshaft

Normally the camshaft will be designed to open and close the loading and discharging truck. Camshaft has a function to help exhaust gas go out and intake gas into the combustion chamber. In case the opening angle of exhaust exhaust is small, it proves that the exhaust cam is worn, at this time there will still be exhaust gas in the cylinder, when the exhaust intake valve opens the exhaust will go out by the intake pipe. 

Therefore, you need to open the cover of the camshaft to check it. You need to turn the motor a few times to see the operation of the xupap after removing the trigger cover. Next, check the xupap springs and the thrusters to see if they are damaged. 

If it is found to be damaged, it is recommended to replace it to eliminate backward explosion in the exhaust pipe as well as to make the cam mechanism work more accurately.

The engine consumes a lot for some reason

3. Reverse explosion phenomenon on the exhaust pipe

Step 1: Look for leaks on the top of exhaust pipes

The explosion on the exhaust pipe occurs when clean air enters the exhaust pipe, together with high pressure, high temperatures and the combination of clean air with unburnt fuel.

Cause &Amp; How to Repair an Engine Backfire High-end Garage Thanh Phong Auto Hcm 2024

The suction force will be created right at the outlet of the exhaust valve when the exhaust valve opens and closes continuously. But if the fresh air enters the exhaust pipe more easily, then there is a leak.

Therefore, you need to immediately check and repair any leaks when detected.

Step 2: Check the non-return valve on the exhaust pipe

On cars manufactured in 2001 or earlier, all exhaust valves will be equipped with a check valve. This type of valve works to bring air into the exhaust pipe in one direction in order to:

  • Contribute to the exhaust system to work better.
  • Burn all the residual fuel in the exhaust pipe.

When a noise appears in the exhaust pipe, this valve may be damaged. Therefore, to be able to check you just need to remove it and blow through this valve, it will be determined. This valve you only need to blow through from one side, in case if you can blow on both sides, it proves that the valve is having problems.

The article above Thanh Phong Auto has introduced to you the causes and how to fix when the phenomenon of reverse engine explosion occurs. Hopefully, with the above sharing, you will have more knowledge to apply the test when your "driver" has the reverse explosion phenomenon!

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