Citroen Grand C4 Picasso racing, what to do?

The engine of your Citroen Grand C4 Picasso gets carried away without pressing the accelerator pedal? Now you have no idea how react and it is very disturbing. Indeed it is necessary to set up the first security measures so that you can then identify your concern. This is why we will help you first of all to know what to do when the engine races on your Citroen Grand C4 Picasso. Then we will indicate Why and what are the deteriorated components that will surely be necessary change.

How to react when the engine races on Citroen Grand C4 Picasso?

What does a racing engine mean on Citroen Grand C4 Picasso?

To start it is necessary to define well symptoms of a racing engine. This term applies when your vehicle continues to climb the towers while you don’t accelerate. You should note that the counter increases on the console. Also you should hear the engine accelerate when it is not coming from you.

What to do when the engine races on Citroen Grand C4 Picasso?

Even if this is very worrying, the first thing to do will be to don’t panic although it is easier said than done. Then turn on the warnings in order to warn other drivers that you have a problem with your car.

  • Then try first to brake quietly with the brake pedal. When you lose speed, gradually shift gears and park when you can.
  • If that doesn’t work, then disengage to put neutral so that the engine speed is no longer transmitted to the wheels. Also try to curb now to be able to park as soon as possible.
  • If it still doesn’t work, remove contact of your vehicle by removing the key. Then let the wheels spin which should decelerate as you go. When you are slower, try to park and help yourself hand brake so as to stop the vehicle.

When your car is parked, go out with precaution of the car. Remember to take the yellow vest so as to be identifiable and the triangle so as to inform the other drivers of your breakdown. You will not have to restart your vehicle, it is highly recommended to call a tow truck .

Why is the engine racing on Citroen Grand C4 Picasso?

Recognize a problem with an engine racing on Citroen Grand C4 Picasso:

Now that you’re safe, you can analyze symptoms of your vehicle and find out why the engine goes up on speed alone. To do this, we would have to start by answering the following questions to carry out the diagnostic of your breakdown.

  • See you black opaque smoke which is exhausted by the hood and the exhaust?
  • Do you feel a peculiar smell ?
  • Is a seeing displayed on the console?
  • Does dieting happen from the start of the vehicle?
  • Is the floor mat hinders the pedal ?

A problem with a racing engine can have various origins. The most noted is self-combustion. When this happens you will usually have some smoke escaping from your car you you will notice a strong smell of burnt oil in the car and the engine light should light up.

On the other hand if this is not your case, then it could come from the throttle sheath. Indeed if the latter is too tight your engine will accelerate continuously and from the start of the car. If you have a problem with the accelerator, the cable is probably seized, so we advise you to put wd40 on the sheath.

Do not forget to check if there is not an element which jams the accelerator pedal.

To understand the phenomenon of auto-combustion on Citroen Grand C4 Picasso:

Self-combustion is a phenomenon generated by the presence of oil in the combustion chamber. Indeed, your engine works with the help of cylinders which will be supplied with a well-defined mixture, by the computers, of air and gasoline. This mixture is compressed to achieve combustion. When done properly this pushes the piston into the cylinder to create engine power. In this way the 4 cylinders rotate in a precise combustion rhythm to move your vehicle forward. Therefore if from the oil gets inside the combustion chambers then the combustion takes place in advance and in an uncontrolled manner, this will deteriorate the rhythm of the engine. Also that goes alter data intended for sensors and create self-combustion. This last will run your engine without having to press the accelerator pedal.

Therefore if the combustion is not carried out correctly then the particles which will not be burned will escape through the muffler and you will see thick black smoke coming out and a smell of burnt oil.

Why is there oil inside the air intake of my Citroen Grand C4 Picasso?

To begin check oil level in your Citroen Grand C4 Picasso. You should know that too much oil in your engine is to be avoided because it could be a reason for self-combustion.

When the levels are good then you should generally suspect the turbo in your Citroen Grand C4 Picasso. The latter has an important role in the air intake of the engine and if it is faulty this can have serious repercussions.

What is the turbo on Citroen Grand C4 Picasso for?

The turbo is a part that allows transmit compressed air necessary for the combustion of fuel in admission. For this the turbo is a small turbine which rotates so as to suck in air. The latter will then be sent into the pipes to provide the necessary quantity of air to the engine. Admission also includes air filter et the throttle body. Finally in order for the propeller to work properly some oil will lubricate the part.

The effects of a turbo failure on Citroen Grand C4 Picasso:

When the turbo is out of service or defective on a vehicle this will generally create oil leaks. And so the oil will therefore mix with the air intended for the engine and will penetrate the combustion chamber of the cylinder. The oil will also be burned, but this will generate excess oil consumption and self-combustion which will generate the phenomenon of the engine racing.

The concern usually comes from a poor fixing at the turbine. Therefore, when it operates at high speed on average 1000 rpm, this will damage the blades of the turbine. But it can also come from a worn seal which allows oil to penetrate. In order to see this, do not hesitate to check the condition of EGR valve , if you find oil at the level of the latter then the diagnosis will be confirmed, there is indeed oil which is inserted in the intake.

To conclude : When the engine races on your Citroen Grand C4 Picasso, this is not a problem to minimize. Generally, as we have seen, the problem is generated by the self-combustion of the engine, this can be due to various reasons such as a failure of the turbo. In all cases, we recommend that you call a tow truck because you should no longer drive your Citroen Grand C4 Picasso until the malfunction is resolved. Note for the future that to properly maintain the air intake of your Citroen Grand C4 Picasso it is recommended to properly maintain the air filter, if you want more information on this subject, you can consult the following article : when to change your Citroen Grand C4 Picasso air filter?

If you ever want to go a little further in the maintenance of your Citroen Grand C4 Picasso, we invite you to consult the other articles on the Citroen C4 Picasso.

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