No spark
Content
When the spark was gone you, of course, will never start the car, and in such a situation, first of all, you need to check the ignition system.
The ignition system of a car plays a key role in its operation. If, with many other malfunctions, the car can be delivered to the service station under its own power, then in case of problems with ignition, it is unlikely that it will be possible to start the internal combustion engine at all.
How to test a spark
There are several ways to check the spark on a candle:
- Check for ground (the body of the candle is pressed against the internal combustion engine and the spark is analyzed during rotation by the starter).
- Checking the candle with a multimeter (you can determine the breakdown of the candle).
- Diagnostics with a tester based on a piezoelectric element (the test principle is similar to the breakdown to ground method, the presence of a spark is determined and is mainly used on injection vehicles).
The main reasons why there is no spark
- problem with spark plugs (flooded or out of order);
- breakdown of high-voltage wires or loss of contact;
- the reason is in the crankshaft sensor (check with a multimeter is required);
- breakdown in the ignition module;
- failure of the ignition coil;
- the problem is in the switch;
- breakdown of the distributor (burning of contacts, loss of clearance);
- poor contact of the ground wire;
- failure or malfunction of the computer.
No spark injector
It is recommended to use a spark gap in order to understand at what stage there is no spark on the spark plugs (no spark from the distributor, no spark from the coil, or from the spark plug itself). If there is no spark in all cylinders at the same time, there may be several culprits:
- controller;
- the whole module;
- coil or center wire.
If no spark from coil ignition, the cause may be hiding in many places. First of all, you need to check the high-voltage armored wire, which must be in perfect condition and without breaking the insulation. Otherwise, the wire must be replaced.
No spark, candle check
If the problem persists, then we check the spark plugs. The contacts of the candles must be clean. That no spark, it may be the dirty contacts of the spark plugs that are to blame. It is best to replace the candles, but you can also clean the contacts. But before changing the candles, check if the discharge reaches the candles themselves. To do this, remove the spark plug wire and bring it to the car body at a distance of 0,5 cm. Scroll the starter several times and see if there is a spark between the wire and the body. The spark should be white with a slight blue tint. If it is absent or present, but with a different shade, we can say that the candles are in order, and the problem is in the heart of the car's ignition system - the coil.
How to check the spark on the ignition coil
in order to make sure that the coil is working at all, pull out the wire from the distributor-breaker that comes from the coil. The same test is carried out with it as with the wires of the candles, namely, they bring the wire to a distance of 0,5 cm and scroll the starter. Now, regardless of the result, we can accurately talk about the cause of the breakdown.
Checking the ignition coil
In the first case, it is necessary to check the contacts in the distributor-breaker for oxidation, insulation failure, and also check the serviceability of the rotor. If there is no spark due to it, then the rotor must be replaced.
Checking the ignition coil also consists in inspecting the integrity of the windings for physical damage, as well as burned out points, which indicate a short circuit in the coil. In these cases, the coil must either be repaired or replaced.
If, after the checks, you understand that in the car there is a spark, but it does not start it, then, perhaps, requires replacement of the ignition lock.
