In this article Mechanical Girl solves a problem of lack of spark in a cylinder of the Chery Arauca or A1.
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Hi, how about, this time I had to make a diagnosis and solve a fault that had a Chery Arauca or A1.
The moment they brought it to me immediately I noticed that the sound of the engine was not even a characteristic symptom that a cylinder was not doing the explosion work.
- Spark plug wrench 5/8 "and an extension of at least 30 cm.
Usually this type of failure in these new cars are detected by the computer thanks to the detonation sensor with the consequent ignition of the engine light. By connecting a scanner it is possible to know which of the cylinders is not working correctly, but if we do not have it, we must do the following:
Many mechanics what they do is remove the spark plug wires one by one with the engine running and notice if there is a change in the behavior of the engine. So when we pull out the cable and notice the engine rpm change, we know that that cylinder is working. If we remove the cable and there is no change in the motor behavior then that is the cylinder that is not working.
This procedure is somewhat risky because if the cable is not caught correctly we can suffer a fairly nasty and dangerous electric shock because it produces involuntary movement that could approach a moving part of the engine causing an accident.
The best thing and what I really recommend is to do the inspection directly and take a spark plug and verify the condition of it that was what I did in this car.
If you saw the video, you will see that the wire of the spark plug No. 4 had water, this was introduced because the user of the car after a heavy rain a high car passed and raised a wake of water that flooded the car engine. He did not turn it off, but he did get water into this part of the engine.
The problem with the existence of water in the cap of the spark plug is that the electric current coming from the coil always seeks to always pass through the site with the least resistance, in this case, as the air from the electrode jump has more resistance than the water present in the cap, the energy prefers to go through the water to the ground of the engine block
Otherwise it happens when there is no water or moisture in the spark plug. Then the electric current will always go to the jump of the electrode to discharge on the ground.
As you can see in the video I show below, with a little compressed air you can quickly dry the spark plug, the spark plug compartment and the cable. If you do not have a compressor available, with a dry cloth and patience you can dry all the parties involved obtaining the same results.
Now, once the fault is solved and the motor works properly, it is necessary to restart the computer so that the memory fault is cleared. This is achieved by disconnecting the negative terminal of the battery for about 10 seconds.
And well, this is all for today. I hope you like the video.
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