Mechanics is a relatively Cartesian field. However, if there is indeed a problem that is at times hard to understand, it is unstable idling or loss of acceleration. Whether it concerns a Renault Grand Scenic 3, or any car model. However, we can help you figure it out. And yes, the cause can come from a lot of engine components, or even electronics. To find the nature of the failure of your Renault Grand Scenic 3, you will have to follow a strict methodology. But first, let's see the symptoms of a faulty idle.idle-problem-Renault-Grand-Scenic-3

Idling problem on a Renault Grand Scenic 3: the symptoms

Un unstable idle close to stall . This is completely the most common idle malfunction. This impression that the engine can stall while driving at an ordinary speed, or that the Renault Grand Scenic 3 grazes . It even happens that stalling occurs. Therefore, it is a real danger for the motorist. If so, don't wait to worry about it. We suggest you make your own diagnosis via the next paragraph. It can also be understood that the Renault Grand Scenic 3 holds a acceleration malfunction . No more reports this time with an idle malfunction. Losses of power and acceleration holes will be able to occur for multiple causes. We must avoid confusing these two different concerns. We suggest that you read our files concerning power losses.

Renault Grand Scenic 3: develop a diagnosis to understand the origin of idling

We must start by performing several very easy checks, just before going into more detail.

Slow motion of the Renault Grand Scenic 3: exhaust fumes.

A black smoke comes out of the exhaust. This generally means that the air and fuel mixture is out of order. Or that your air filter is clogged. In both cases, an idling malfunction can occur on the Renault Grand Scenic 3. A White smoke comes out of the exhaust. This time again it can come from a disturbance. White smoke is usually water vapor. It is therefore possible that it may be a malfunction of the intake or the cylinder head gasket.

Engine components check

As we have demonstrated, an idle malfunction on a Renault Grand Scenic 3 can come from many components. We must therefore try to inspect the engine carefully. However, it is suggested to be extremely careful and not to tamper with the engine components too much, as this may amplify the problem or deflect the cause of the malfunction. We of course suggest that you go to a garage for a more in-depth check. Here are therefore step by step the components to be examined.

  • The first thing to do is check all of the hoses . The latter can be perforated or even detached.
  • In addition, the sensors and sensors of your engine. It is however difficult to check their correct functioning. You can find tutorials on youtube, and that usually requires electronic devices.
  • Perform a check of pressures Hydraulic. Again, pressure checks require appropriate equipment.

Idling problems are common, however, are hard to recognize. A visual check on the Renault Grand Scenic 3 gives an idea, nevertheless it is preferable not to tackle amateur DIY.