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Cut off while driving. E70 x5. 09. Change air filter fuel…

Customer Question
Cut off while driving ...

Cut off while driving

Mechanic's Assistant: What is the model/year of your BMW?

E70 x5

Mechanic's Assistant: What year is your X5?

09

Mechanic's Assistant: Are you fixing your X5 yourself? What have you tried so far?

Change air filter fuel filter and battery alt went bad and I replaced it

Mechanic's Assistant: Did you test the battery with a voltmeter? And have you ever changed one before?

Yes a year ago

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

That's all

Submitted: 3 months ago.Category: BMW
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Answered in 6 minutes by:
3/12/2018
BMW Mechanic: Steve, BMW Expert replied 3 months ago
Steve
Steve, BMW Expert
Category: BMW
Satisfied Customers: 25,679
Experience: BMW Expert
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Hi how can I help you with this? Did you want to know possible causes?
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Customer reply replied 3 months ago
Yep I want to know the cause
BMW Mechanic: Steve, BMW Expert replied 3 months ago

the most common cause would be a failing cam or crank sensor, or a failed fuel pump
you will need to check for spark, power to the fuel pump and fuel pressure as next steps, then proceed with a fault scan and compression test

If you need more help please use the reply tab to continue our conversation. If no further assistance is needed, please consider rating me as 5 STAR!! It is much appreciated. You can rate at any time and we can continue to work on your question after you rate if needed - rating will not close out your question. Please do not forget to leave a positive rating as this is the only way I receive credit for my time and answer, thank you.

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Customer reply replied 3 months ago
The vehicle is diesel
BMW Mechanic: Steve, BMW Expert replied 3 months ago
Ok. That wasn’t stated. Then The issue is most likely fuel related.
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Customer reply replied 3 months ago
What to check
BMW Mechanic: Steve, BMW Expert replied 3 months ago
Power to the fuel pump and fuel pressure as I said.
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Customer reply replied 3 months ago
what should I change
Customer reply replied 3 months ago
Or replace
BMW Mechanic: Steve, BMW Expert replied 3 months ago
You can’t just start changing parts - you need to make proper checks of power and fuel pressure to further diagnose - there isn’t only one thing that can cause this.
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Customer reply replied 3 months ago
Cam and crank also
Customer reply replied 3 months ago
Fuel pump and what else
BMW Mechanic: Steve, BMW Expert replied 3 months ago
The fuel pump is the prime suspect, that is where to start. After that you will need a bmw scanner as it won’t be something you can manually diagnose
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Customer reply replied 3 months ago
It don't happen all the time and it start back one time
BMW Mechanic: Steve, BMW Expert replied 3 months ago
It is still likely fuel related
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BMW Mechanic: Steve, BMW Expert replied 3 months ago
That is where you need to start,
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Customer reply replied 3 months ago
It showing no codes
BMW Mechanic: Steve, BMW Expert replied 3 months ago
That would indicate a mechanical fuel pump problem
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BMW Mechanic: Steve, BMW Expert replied 3 months ago
If you need more help please use the reply tab to continue our conversation. If no further assistance is needed, please consider rating me as 5 STAR!! It is much appreciated. You can rate at any time and we can continue to work on your question after you rate if needed - rating will not close out your question. Please do not forget to leave a positive rating as this is the only way I receive credit for my time and answer, thank you.
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Customer reply replied 3 months ago
I will start with fuel and will let you know cam and crank would not cause that
BMW Mechanic: Steve, BMW Expert replied 3 months ago
No. Fuel is the suspect. Please do not forget to click on a positive rating. If you would like to follow up you can do so after leaving a rating.
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Customer reply replied 3 months ago
Should I change the electrical one first
Customer reply replied 3 months ago
Or both
BMW Mechanic: Steve, BMW Expert replied 3 months ago

change what?

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Customer reply replied 3 months ago
Is there a electrical fuel pump ?
BMW Mechanic: Steve, BMW Expert replied 3 months ago

there is only electrical that could be the issue. Please do not forget to leave a positive rating as this is the only way I receive credit for my time and answer, thank you.

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Customer reply replied 3 months ago
Where is it situated in the vehicle ? The elec fuel pump
BMW Mechanic: Steve, BMW Expert replied 3 months ago

in the fuel tank. Please do not forget to leave a positive rating as this is the only way I receive credit for my time and answer, thank you.

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Customer reply replied 3 months ago
Ok
BMW Mechanic: Steve, BMW Expert replied 3 months ago

please consider rating me as 5 STAR!! It is much appreciated. You can rate at any time and we can continue to work on your question after you rate if needed - rating will not close out your question. Please do not forget to leave a positive rating as this is the only way I receive credit for my time and answer, thank you.

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Customer reply replied 3 months ago
Diesel smoke coming in my a/C VENT WHEN park and idling how to stop that
BMW Mechanic: Steve, BMW Expert replied 3 months ago

hi there, if you have a new question, it will need to be posted to its own thread, per site policy. as the present question has been answered, please kindly click on a positive rating to ensure I receive proper credit for my time and answer.

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