How to beat the high fuel consumption of a used car
- April 18, 2023
- 0
Often, after buying a used car, the owner begins to notice that the fuel consumption of his “iron horse” is much higher than that of an ordinary one.
Often, after buying a used car, the owner begins to notice that the fuel consumption of his “iron horse” is much higher than that of an ordinary one. And there are no obvious problems with the power unit. The AvtoVzglyad portal tells why this is happening and what needs to be done so as not to spend extra money.
There are many reasons for the increased appetite of the engine. That is why a driver who goes to the service with such a problem is always a welcome customer. Masters can change half of the car, but the malfunction will not be fixed. So it is necessary to look for the cause in both obvious and non-obvious places.
The simplest thing is to inspect the car from below. An exhaust system damaged by a stone chip can increase fuel consumption. Then check the condition of the air and fuel filters. Even a woman can do it. A “breather” clogged with dirt will cause the engine to “suffocate” and the ECU to misform the composition of the mixture. And the “firebox” simply prevents the normal passage of fuel to the engine.
By the way, if the car is premium, for example, Mercedes-Benz ML, then the so-called MAF sensor fails due to a clogged filter – a sensor for the flow rate of incoming air. It sends erroneous signals to the “brain” of the car, so costs rise. Unfortunately, its replacement will cost a decent amount (about 80,000 rubles), but it is not worth saving and installing Chinese counterparts.
However, usually a simple replacement of consumables does not solve the problem. We have to dig deeper. Here we note that few people pay attention to such a node as an adsorber or a gasoline vapor recovery system. It is available on all vehicles meeting Euro-2 and higher eco standards. Outwardly, the node looks like a plastic container. It has a valve, which over time begins to open poorly or even stick. This is why costs are rising. And sometimes the adsorption cavity itself is clogged. The whole must then be disassembled, cleaned and dried. This will restore the gas filtration and the problem will go away.
Another implicit cause that is often overlooked is when an overly rich mixture enters the power unit if the coolant temperature sensor is malfunctioning. You have to see what condition it is in.
Finally, the fuel burner can also be related to insufficient pressure that the fuel pump creates. Approximately it is about 3.5 bar on distributed injection engines. A measurement below this mark is problematic.
Photo: n-russia.ru
There are many reasons for the increased appetite of the engine. That is why a driver who goes to the service with such a problem is always a welcome customer. Masters can change half of the car, but the malfunction will not be fixed. So it is necessary to look for the cause in both obvious and non-obvious places.
The simplest thing is to inspect the car from below. An exhaust system damaged by a stone chip can increase fuel consumption. Then check the condition of the air and fuel filters. Even a woman can do it. A “breather” clogged with dirt will cause the engine to “suffocate” and the ECU to misform the composition of the mixture. And the “firebox” simply prevents the normal passage of fuel to the engine.
By the way, if the car is premium, for example, Mercedes-Benz ML, then the so-called MAF sensor fails due to a clogged filter – a sensor for the flow rate of incoming air. It sends erroneous signals to the “brain” of the car, so costs rise. Unfortunately, its replacement will cost a decent amount (about 80,000 rubles), but it is not worth saving and installing Chinese counterparts.
However, usually a simple replacement of consumables does not solve the problem. We have to dig deeper. Here we note that few people pay attention to such a node as an adsorber or a gasoline vapor recovery system. It is available on all vehicles meeting Euro-2 and higher eco standards. Outwardly, the node looks like a plastic container. It has a valve, which over time begins to open poorly or even stick. This is why costs are rising. And sometimes the adsorption cavity itself is clogged. The whole must then be disassembled, cleaned and dried. This will restore the gas filtration and the problem will go away.
Another implicit cause that is often overlooked is when an overly rich mixture enters the power unit if the coolant temperature sensor is malfunctioning. You have to see what condition it is in.
Finally, the fuel burner can also be related to insufficient pressure that the fuel pump creates. Approximately it is about 3.5 bar on distributed injection engines. A measurement below this mark is problematic.
Source: Avto Vzglyad
Donald Salinas is an experienced automobile journalist and writer for Div Bracket. He brings his readers the latest news and developments from the world of automobiles, offering a unique and knowledgeable perspective on the latest trends and innovations in the automotive industry.
