4 VW High Pressure Fuel Pump Failure Symptoms You Must Know!
What are the common VW high pressure fuel pump failure symptoms? Whenever you are on a freeway and observe some unusual behaviors from the engine, like your whole Volkswagen engine not having proper combustion, it is a significant symptom of fuel pump failure.
Generally, when the high-pressure fuel pump of Volkswagen does not assist the fuel to pump inside the engine, the vehicle starts sputtering. That is the symptom that you must notice while driving.
There are some other symptoms, and you have to find out on your own about VW high pressure fuel pump failure symptoms. Therefore, stay tuned with us to learn all the facts.
VW High Pressure Fuel Pump Failure Symptoms – Here Are All You Must Know
Certainly, a vehicle is nothing but a complex set of machines and instruments. And of course, Volkswagen is the car that we always love to have. One thing we must keep in our mind, if we take care of our vehicle, it will serve us the best.
Let’s check out what are the symptoms of a bad high pressure fuel pump.
1. Sputtering When Your Car Has A Good Pace
The first symptom is sputtering. It means the injector cannot inject the fuel into the engine by maintaining the flow. As a result, your engine will skip a few power strokes. You will notice the engine sputtering on a freeway, and your VW’s speed is above 50 MPH.
When the failure starts, it generally shows the symptom like sputtering for a concise while, like one min. Nonetheless, if you continue driving, you will perceive the engine sputtering frequently and unable to move further.
So, whenever you face such difficulties, you pull over the car to the nearest workstation to keep the flow running.
2. Engine Is Turning Off
When your VW cannot keep the high-pressure fuel flow, it loses the capabilities to keep the engine running. So, whenever you are pushing the car or ordinarily parking and a high-pressure fuel pump can’t inject the fuel to the engine, it will be turned off automatically.
Generally, it occurs whenever you are at a low speed since it requires robust injection at that moment. Moreover, this failure does not happen all at once and frequently increases as time passes.
3. Loss Of Power
Injecting less fuel or delaying Volkswagen’s high-pressure fuel pump is also considered a failure. If it continues, it will increase randomly and cause a complete failure. So, mark it as another phase of failure.
In this case, you will notice when you push the accelerator, the engine is responding late, or sometimes there is no response. As a result, the engine will lose its power and catch the right tone. Moreover, it may create an unusual vibration due to the lack of fuel.
As a suggestion, we can say your VW needs an inspection as early as possible.
You might want to learn some of the common VW brake master cylinder problems to be aware of.
4. Engine Cranks & Vibrates, No Start
Another most vital symptom is your vehicle won’t start. It will crank and vibrate when you push the ignition, but the engine will not start. It means that neither the fuel passes through the injector nor is it burning the fuel to operate the cylinder.
Why The VW High Pressure Fuel Pump May Fail?
It is vital to know the reason why it happens. There are plenty of reasons behind the high-pressure fuel pump failure. Here are some of those.
Lack Of Proper Care
The German road beast must be petted properly, and maintenance is necessary. The maintenance process must include checkups within an interval.
When you skip the general caring process like oil change and determining the present status of the fuel pump, VW TDI high pressure fuel pump failure symptoms may arise.
Another most prevalent reason is the lack of accurate oil. If you desire to avoid the high-pressure fuel pump failure, you must select the oil which meets the OEM specifications.
In the case of Volkswagen, they have their specified engine oil. Using the wrong oil can cause disastrous situations for the high-pressure fuel pump, and eventually, it fails.
Break Down Of The Injector
When considering the fuel pumping system, the injector plays a vital role. Since the injector handles plenty of pressure, it can be broken at any time.
Moreover, the carbon molecule builds up a significant layer on the injector, which prompts the breakdown of the injector, and it fails to inject the fuel into the engine.
Also Raed: VE Pump Vs P Pump: Things You Should Know
In the end, the reasons can cause the VW high-pressure fuel pump to fail.
Frequently Asked Questions (FAQs)
What happens if a high pressure fuel pump fails?
When a high-pressure fuel pump fails, several matters can occur. First, your engine will lose the power to cooperate with you according to acceleration.
In addition, your engine may not start at all. Lastly, you will feel the slow responses from the engine when you accelerate.
What causes high pressure fuel pump failure?
Several incidents can cause the high-pressure fuel pump to fail. The major causes are lack of proper care and random servicing, bad fuel injector leak on the pipeline, and engine oil.
What happens when a high pressure fuel pump fails?
You may face several things when your vehicle’s high-pressure fuel pump fails. First, your engine will lose the power to cooperate with you according to acceleration.
In addition, your engine may not start at all. Eventually, you will feel the slow responses from the engine when you accelerate.
Can you drive with a bad high pressure fuel pump?
The answer is yes and no at the same time. When the high-pressure fuel pump is bad, your vehicle will show symptoms.
If you do not take the necessary steps, the fuel injection process will be interrupted, harming the engine enormously.
Can you fix a high pressure fuel pump?
Of course, problems are meant to be fixed. After determining the accurate location of the problem, you can mend the fuel pump. You may need to replace the broken part if the problem is major.
Volkswagen is one of those car manufacturers which include only high-end tools in their cars. When your vehicle ages, you may observe VW high pressure fuel pump failure symptoms, and it is pretty common.
So, the wise thing is, you must stop worrying about the remarkable performance when observing one of the fuel pump failure symptoms and go for a profound inspection.
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Zain Mark- Diagnostic Technician
Meet our diagnostic technician expert managing all the topics related to diagnosing vehicle problems, especially the problems with ECU or PCM.
He is sharing his years of working experience troubleshooting modern car programs and dashboard issues with all. In his free time, Zain is found playing his guitar, tuning a new tune.