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Continuous flight: how to quickly identify the cause of increased engine speed

  • November 1, 2023
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While the Chinese try to collect the cream of the crop from the small middle class, and the native LADA consists of cars, the majority of the population

While the Chinese try to collect the cream of the crop from the small middle class, and the native LADA consists of cars, the majority of the population does not have to choose: we are left with only used ones. Imported or domestic – it depends on the circumstances. But whatever nationality the used car has, it will need to be repaired, and the better we know ourselves, the less money we leave for the gas station.

A used car is used because it requires much more attention from the owner than a new one. The list of components and assemblies requiring maintenance is longer and the amount paid for maintenance goes well beyond the “oil + filter” limit. After three years of use, the suspension elements, the battery and some sensors begin to ‘give up’. Characteristic ulcers emerge. And the further, the more.

A five-year-old car can already be an enigma with major breakdowns, but a ten-year-old car can put it in the most difficult position: there are so many problems that there is nothing left to repair. One “sore” can be hidden in several circuits at once, and its “treatment” can take an entire heating season. And you still have to make a correct diagnosis, which is sometimes very difficult.

Naturally, workshops take advantage of this, often “condemning” working parts and often even carrying out repairs according to the “from cheap to expensive” principle, changing element after element. A good example is solving the problem of a sharp and unreasonable increase in turnover. In a traffic jam, on the road, in a parking lot – anywhere.

So nothing had preceded it, but the tachometer shot up like firelights and stopped at about 1500-2000 rpm. I’ll tell you a terrible secret: there is no car where these are normal values ​​“at rest”. That is, in parking mode. The engine cannot run continuously at 1.5 thousand. The problem is identified, accepted – halfway. We’re going to the gas station. And that’s where the leapfrog begins with the throttle valve (which is first washed and then ‘condemned’), the IAC sensor and numerous other elements. But each copy costs a fortune! A new node is a better node, but in this case the best is the enemy of the good.

Insufficient speed is a common story and the cause must be localized down to the smallest detail. From the accelerator pedal cable. The fact is that it is located in a special wave, which over time becomes filled with dirt, which prevents the cable from moving softly and smoothly. Moreover, over the years and kilometers it wears out, swells and naturally begins to cling to this undulation. So the revs rise without returning to their place.

Do you want simple diagnostics? When the RPM increases in neutral, use your trunk to lift the accelerator pedal and move it up. In three out of four cases, the indicators return to the required values. And the cause of the unpleasant, but far from fatal malfunction will be precisely determined: the throttle cable needs to be replaced. Will they talk about this method in the workshop? Hardly.

Photo: magazine.northeast.aaa.com

A used car is used because it requires much more attention from the owner than a new one. The list of components and assemblies requiring maintenance is longer and the amount paid for maintenance goes well beyond the “oil + filter” limit. After three years of use, the suspension elements, the battery and some sensors begin to ‘give up’. Characteristic ulcers emerge. And the further, the more.

A five-year-old car can already be an enigma with major breakdowns, but a ten-year-old car can put it in the most difficult position: there are so many problems that there is nothing left to repair. One “sore” can be hidden in several circuits at once, and its “treatment” can take an entire heating season. And you still have to make a correct diagnosis, which is sometimes very difficult.

Naturally, workshops take advantage of this, often “condemning” working parts and often even carrying out repairs according to the “from cheap to expensive” principle, changing element after element. A good example is solving the problem of a sharp and unreasonable increase in turnover. In a traffic jam, on the road, in a parking lot – anywhere.

So nothing had preceded it, but the tachometer shot up like firelights and stopped at about 1500-2000 rpm. I’ll tell you a terrible secret: there is no car where these are normal values ​​“at rest”. That is, in parking mode. The engine cannot run continuously at 1.5 thousand. The problem is identified, accepted – halfway. We’re going to the gas station. And that’s where the leapfrog begins with the throttle valve (which is first washed and then ‘condemned’), the IAC sensor and numerous other elements. But each copy costs a fortune! A new node is a better node, but in this case the best is the enemy of the good.

Insufficient speed is a common story and the cause must be localized down to the smallest detail. From the accelerator pedal cable. The fact is that it is located in a special wave, which over time becomes filled with dirt, which prevents the cable from moving softly and smoothly. Moreover, over the years and kilometers it wears out, swells and naturally begins to cling to this undulation. So the revs rise without returning to their place.

Do you want simple diagnostics? When the RPM increases in neutral, use your trunk to lift the accelerator pedal and move it up. In three out of four cases, the indicators return to the required values. And the cause of the unpleasant, but far from fatal malfunction will be precisely determined: the throttle cable needs to be replaced. Will they talk about this method in the workshop? Hardly.

Source: Avto Vzglyad

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