Having a problem with your car is common, because regrettably recent vehicles are more and more difficult and consequently at the mercy of more and more possible breakdowns. On this page we’re going to try to help you to fix an injection problem on your Volkswagen Polo 4 . This is a problem that is specially annoying because it can sooner or later bring your vehicle to non starting or broken engine. To do this, first we will see how injection functions, then, what are the different problems that can exist on a Volkswagen Polo 4 injectors , and finally, how to fix them.
What is the aim of the injection of a Volkswagen Polo 4?
So we start our content page by quickly detailing how an injection system functions so that you have all the information you need to understand the failures connected with it. < br>
The injection system of a Volkswagen Polo 4 handles the fuel intake into the engine , it replaces the old carburettors. It has the benefit to be much more precise and to come, under pressure, to discharge the fuel in the engine. The injection pump takes care of pressurizing the fuel and transferring it to the injectors, and the injectors will release the fuel in the form of micro-drops into the cylinders of your Volkswagen Polo 4. The benefit of fuel injection is to have a much more precise dosage than a carburettor and to allow a better air/fuel mixture and consequently a better combustion.
What are the different injection problems on Volkswagen Polo 4?
Now in this second part, we are going to explore the different injection problems and their symptoms that you may possibly confront on your Volkswagen Polo 4 .
Injection pump problems Volkswagen Polo 4
To commence, we will see the injection pump problems on your Volkswagen Polo 4, there are not many of them, they are generally persistent but we will outline them down below:
- Electronic problem of the high pressure pump: If you have an electronic problem, the pressure in your injection system might be too high or too low which will trigger a bad air/fuel mixture and consequently a bad combustion and thus alter the performance of the engine of your Volkswagen Polo 4.
- Leakage from the injection pump of your Volkswagen Polo 4: If you have a major leakage problem, the result will be much the same as if you have a lack of pressure, you will not have enough pressure and consequently the combustion of your fuel will not be good
.
Concerning the outcomes and symptoms of a fuel pump problem on a Volkswagen Polo 4 , you will most certainly experience, a lack of power, your engine grazing, dark smoke emissions…
Injectors problems Volkswagen Polo 4
Now we move on to the injector problems on Volkswagen Polo 4 . Injectors are the end of your injection system, here are the different problems you may possibly encounter:
- Dirty Volkswagen Polo 4 injectors: This can happen due to poor fuel quality, they will let less fuel through or more if they are entirely clogged. So you will probably have one or more cylinders that are not working properly.
- Leaky Volkswagen Polo 4 injector: It’s generally at the high pressure seals that an injector can leak, it can also, more rarely, be cracked or broken.
- Injector Volkswagen Polo 4 HS: This is the case when your injectors are entirely clogged or when you have an electronic problem, it will not let anything go.
Concerning the symptoms of injector problems on your Volkswagen Polo 4 it is about the same as for a defective injection pump. You may possibly encounter problems with starting, throttle response, power loss, and smoke emission.
How to fix an injection problem on a Volkswagen Polo 4?
To conclude our content page on the injection problems on Volkswagen Polo 4 , we will try to give you the solutions that exist to fix these problems.
If after a precise investigation it’s your injection pump that is the cause of your problems, it will regrettably be very complicated to intervene on the issue without changing the part, this change generally goes with the replacement of the injectors, and sometimes the tank, it will take between 2000 and 3000 euros for the whole, try to get several diagnostics and estimates before starting any repair.
Concerning a problem with an injector there are various solutions based on your concerns, here they are:
- Dirty injector: You can clean the injectors of your Volkswagen Polo 4, do not be reluctant to seek advice from our content page on this subject to get the procedure. If it doesn’t work, you will have to replace them.
- Leaky injector: The replace and the purchase of a joint kit will only cost you a few tens of euros, but you still need to be able to replace it, do not think twice to seek advice from our content page on the injectors that leak on Volkswagen Polo 4, to have all the solutions available to you.
- Injector HS: Finally, last solution, your injector is damaged or doesn’t work anymore, generally, the replacement of an injector costs around 500 euros labor included.
If you wish more guides on the Volkswagen Polo 4, go to our Volkswagen Polo 4 category.
