Having a problem with your car is traditional, because regrettably recent automobiles are more and more complex and therefore subject to more and more possible breakdowns. On this page we’re going to try to help you to fix an injection problem on your BMW 5 Series . This is a problem that is particularly bothersome because it can sooner or later bring your vehicle to non starting or broken engine. To do this, first we will find out how injection functions, then, what are the different problems that can exist on a BMW 5 Series injectors , and at last, how to fix them.

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What is the aim of the injection of a BMW 5 Series?

So we start our content page by promptly explaining how an injection system functions so that you have all the info you need to figure out the failure connected with it. < br>
The injection system of a BMW 5 Series manages the fuel intake into the engine , it replaces the old carburettors. It has the advantage to be much more precise and to come, under pressure, to launch the fuel in the engine. The injection pump takes care of pressurizing the fuel and transferring it to the injectors, and the injectors will discharge the fuel in the form of micro-drops into the cylinders of your BMW 5 Series. The advantage of fuel injection is to have a much more precise dosage than a carburettor and to enable a better air/fuel mixture and therefore a better combustion.

What are the different injection problems on BMW 5 Series?

Now in this second part, we are going to see the different injection problems and their signs of illness that you may face on your BMW 5 Series .

Injection pump problems BMW 5 Series

To begin, we will find out the injection pump problems on your BMW 5 Series, there are not many of them, they are generally recurrent but we will highlight them below:

  • Electronic problem of the high pressure pump: If you have an electronic problem, the pressure in your injection system may be too high or too low which will cause a bad air/fuel mixture and therefore a bad combustion and thus alter the performance of the engine of your BMW 5 Series.
  • Leakage from the injection pump of your BMW 5 Series: If you have a major leakage problem, the consequence will be much the same as if you have a lack of pressure, you will not have enough pressure and therefore the combustion of your fuel will not be good

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Concerning the outcomes and signs of illness of a fuel pump problem on a BMW 5 Series , you will certainly experience, a lack of power, your engine grazing, dark smoke emissions…

Injectors problems BMW 5 Series

Now we move on to the injector problems on BMW 5 Series . Injectors are the end of your injection system, here are the different problems you may encounter:

  • Dirty BMW 5 Series injectors: This can happen as a result of poor fuel quality, they will let less fuel through or more if they are completely clogged. So you will possibly have one or more cylinders that are not working effectively.
  • Leaky BMW 5 Series injector: It’s generally at the high pressure seals that an injector can leak, it can also, more rarely, be cracked or broken.
  • Injector BMW 5 Series HS: This is the circumstance when your injectors are completely clogged or when you have an electronic problem, it will not let anything go.

Regarding the symptoms of injector problems on your BMW 5 Series it is about the same as for a faulty injection pump. You may encounter problems with starting, throttle response, power loss, and smoke emission.

How to get rid of an injection problem on a BMW 5 Series?

To conclude our article on the injection problems on BMW 5 Series , 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 source of your problems, it will regrettably be very complicated to intervene on the trouble without replacing 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 BMW 5 Series, do not hesitate to consult our content page on this subject to get the process. If it doesn’t work, you will have to replace them.
  • Leaky injector: The change and the purchase of a joint kit will only cost you a few tens of euros, but you still need to have the ability to change it, do not think twice to consult our content page on the injectors that leak on BMW 5 Series, to have all the solutions available to you.
  • Injector HS: Finally, last solution, your injector is broken or doesn’t work anymore, generally speaking, the replacement of an injector costs around 500 euros labor included.

If you need more guides on the BMW 5 Series, go to our BMW 5 Series category.