How and when to check the spark on the spark plug on the carburetor and injector
Content
Next, carefully examine the surface of the SZ, make a diagnosis of defects and identify burnt places. In a car with a carburetor, check for the presence of an arc of a high-voltage cable on the engine housing. Look at the gap between the electrodes (should be in the range of 0,5-0,8 mm). The spark is checked on a metal surface of a car with a carburetor with the starter turned on.
Sometimes the engine of a carburetor or injection machine suddenly starts to triple or does not start. In this situation, you need to check for a spark at the spark plug. There are simple ways for drivers to independently test the operation of the SZ.
Signs that you need to check the candles for a spark
By the characteristic symptoms, you can determine the type of car malfunction.
The main signs why the spark disappears on the spark plug electrodes:
- The engine does not start or immediately stalls when the starter is running.
- Power is lost with a simultaneous increase in gasoline costs.
- The engine runs randomly, with gaps.
- The catalytic converter fails due to the release of unburned fuel.
- There are cracks and mechanical damage to the body of one or more SZ.
The reason for the lack of sparking may be a faulty high-voltage wire. Therefore, before testing the spark plugs, it is necessary to verify the correct functioning of other components of the machine.
Weak spark at spark plugs
A common problem of difficult starting and unstable engine operation is cold weather. Often a sign of a malfunction is a dark deposit on the surface of the candle.
The main reasons why there is no spark
The usual symptoms of a malfunction are a drop in power with the release of unburned fuel particles from the muffler. The engine starts with difficulty, stalls even at high speeds.
Reasons for the lack of spark in the NW:
- flooded electrodes;
- broken or weak contact;
- breakdown of components and parts of the ignition system;
- resource development;
- soot on the surface of the SZ;
- slag deposits, product melting;
- cracks and chips on the body;
- car ECU failure.
Checking the operation of the SZ must be carried out carefully so as not to spoil the carburetor engine or injector. Before looking for other causes of the malfunction, you need to make sure that there is sufficient voltage at the battery terminals.
How to check the spark on the spark plug yourself
Diagnostics is often done with the dismantling of the SZ and a preliminary examination of mechanical damage.
Methods for checking spark plugs for spark:
- Shutdown in a row for one SZ. As a way to detect changes in engine operation - vibration and extraneous sound.
- Test for the presence of an arc to "mass" with the ignition on. A good spark plug will spark on contact with a surface.
- A gun in which high pressure is created on the NW.
- Piezo lighter.
- Electrode gap control.
More often, the first two methods are used to check spark plugs. To ensure safety, before testing, it is necessary to disconnect the SZ from the wires.
On carb
Before checking the candles, it is important to make sure that the ignition systems and the integrity of the wires are working properly. Next, carefully examine the surface of the SZ, make a diagnosis of defects and identify burnt places.
The spark is checked on a metal surface of a car with a carburetor with the starter turned on.
On the injector
In a car with sensitive electronic equipment, the engine must not be turned on with the CZ removed. In the case when there is no spark, you can find out about the presence of contacts using a multimeter and other methods that do not involve starting the engine.
Before testing the SZ, it is necessary to check the serviceability of cables, sensors and ignition coils. And also measure the gap of the electrodes. The normal size for an injector is 1,0-1,3 mm, and with HBO installed - 0,7-0,9 mm.
