Mechanics is a relatively methodical field. But if there is indeed a problem that is sometimes difficult to explain, it is unstable idle or throttle holes. Whether it concerns a Renault Grand Scenic 2, or any other type of vehicle. But we're here to help. Indeed, the reason can come from a lot of engine components, even electronic. To find the nature of the breakdown of the Renault Grand Scenic 2, it is necessary to follow a strict methodology. But first, we'll see the signs of a poor idle.idle-problem-Renault-Grand-Scenic-2

Idling problem on a Renault Grand Scenic 2: the symptoms

Un unstable idle close to stall . This is completely the most common problem in slow motion. That feeling that the engine may stall while driving at a normal pace, or that the Renault Grand Scenic 2 grazes . It can happen that the vehicle stalls. Therefore, it is really dangerous for the motorist. In this case, do not wait too long to take care of it. We suggest that you carry out your own control through the following paragraph. We can also understand that your Renault Grand Scenic 2 has a concern for acceleration . More report in this case with a concern of low regime. Losses of power and acceleration holes could happen for many reasons. We must avoid confusing these two phenomena. We suggest you read our articles on power losses.

Renault Grand Scenic 2: develop a diagnosis to understand the origin of idling

You have to start by performing various very easy checks, before going into even more detail.

Slow motion of the Renault Grand Scenic 2: exhaust fumes.

A black smoke comes out of the exhaust. This usually means that the air and fuel mixture is out of order. Or that the air filter is clogged. In both situations, a problem with idling can occur on the Renault Grand Scenic 2. White smoke comes out of the exhaust. In this case also it can be due to a defect. White smoke is usually water vapor. It is thus possible that it is a problem of admission or of the cylinder head gasket.

Engine components check

As we have shown, a problem with idling on the Renault Grand Scenic 2 can come from several factors. You should therefore try to inspect the engine carefully. On the other hand, it is advisable to be extremely careful and not to touch too much with the components of the engine, because this can aggravate the problem or hide the origin of the problem. We of course recommend that you go to a mechanic for a more appropriate check. Here is therefore step by step the constituents to be checked.

  • The first thing to do is check all hoses . These can be pierced, or even detached.
  • You also need to check the sensors and sensors of your engine. It is however difficult to control their proper functioning. You can find tutorials on youtube, and that usually requires electronic devices.
  • Perform a check of pressures hydraulic. Again, the pressure tests require an appropriate tool.

Idling problems are common however are difficult to diagnose. A visual check on your Renault Grand Scenic 2 gives the opportunity to get an idea, however it is better not to tackle amateur DIY.