Mechanics is a fairly logical area. However, if there is indeed a concern that is sometimes complex to explain, it is an unstable idle or loss of acceleration. Whether for a smart fortwo, or for any other model of automobile. However, we can help you understand. And yes, the cause can come from a large number of engine parts, even electronic. To detect the origin of the breakdown of this smart fortwo, we will have to follow a strict methodology. But first, let's see the symptoms of a faulty idle.problem-idle-smart-fortwo

Idling problem on a smart fortwo: symptoms

Un unstable idle close to stall . This is undoubtedly the most recurrent dysfunction in slow motion. This feeling that the engine may stall while driving at normal speed, or that the smart fortwo grazes . It happens that the vehicle stalls. It is therefore a real danger for the driver. If so, don't wait too long to take care of it. We suggest that you carry out your own diagnosis via the following paragraph. We can also understand that the smart fortwo has a acceleration malfunction . No longer reported in this case with idle malfunction. Losses of power and acceleration holes can appear for multiple causes. These two phenomena should not be confused. We advise you to read our articles related to power losses.

smart fortwo: developing a diagnosis to understand the origin of idling

You need to start by doing a number of extremely simple checks, just before going into more detail.

Idle of the smart fortwo: exhaust fumes.

A black smoke emanates from the exhaust. This generally means that the air and fuel mixture is out of order. But also that the air filter is obstructed. In both situations, an idle malfunction may appear on the smart fortwo. A White smoke emanates from the exhaust. This time also it can be due to a deregulation. White smoke is usually water vapor. It is therefore possible that it is a malfunction of the intake or of the cylinder head gasket.

Engine components check

As we said, an idle malfunction on the smart fortwo could come from several constituents. You should therefore try to inspect the engine carefully. However, it is advisable to be extremely careful and not to tamper with the motor connections, as this can aggravate the problem or divert the nature of the malfunction. We suggest of course going to an auto repairer for a more in-depth audit. Here are the elements to check step by step.

  • The first thing to do is check all of the hoses . These can be perforated, or even detached.
  • You should also check the sensors and sensors of your engine. It is, however, complicated to verify their proper functioning. Tutorials are easily found on youtube, and this often requires electronic devices.
  • Perform a control of pressures hydraulic. Again, the pressure tests require suitable equipment.

Idle concerns are common, however, are difficult to diagnose. A visual check on the smart fortwo allows you to have an idea, however it is more advisable not to venture into amateur DIY.