BMW X5 BIO DIESEL FUEL INJECTION SYSTEM FAULT, PLEASE HELP?

  • Tiny
  • Seanbage
  • 2003 BMW X5

Hi

I have a BMW X5 e53 3.0D on from the year 2003.

I have just encountered a problem today. I will tell what has happened, and hopefully someone can HELP?

I used biodiesel for the first time yesterday by a mix of about 50/50 regular diesel to bio diesel, (I know I probably should have used more diesel now). A day later the car went into limp mode on a bank and slowly got to the top, the problem then went and the car drove as normal.

A day later than that I drove the car for about 10 miles and on the same bank (coincidence?) The car went back into limp mode and eventually lost all power and came to a stop, with a note on the onboard computer saying 'fuel inject problem'.

The car now starts sometimes or doesn't even start. I have used some diesel injector cleaner (Redex) to no success.

I am waiting for a new fuel filter to arrive which will be changed.

Has anyone ever had the same problem?
Does anyone know a possible fix for this?

I greatly appreciate all help from everyone, big or small so thanks in advance.

Sean

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Saturday, December 24th, 2011 AT 8:27 PM

3 Replies

  • Tiny
  • Rivermikerat
  • MEMBER

Most likely what's happened is you bought biodiesel that wasn't properly processed and filtered. My daughter's ex-boyfriend used to use biodiesel exclusively in his GMC pickup and never had a problem with the fuel system.

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Saturday, December 24th, 2011 AT 8:43 PM
  • Tiny
  • Seanbage
  • MEMBER

Thanks for answer rivermikerat.

My dad has been using the same in his BMW 320D, that's why I thought it would have been ok. How did your daughters ex boyfriend fix the problem?

Thanks again

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Saturday, December 24th, 2011 AT 9:05 PM
  • Tiny
  • Rivermikerat
  • MEMBER

He never had a problem. It ran wonderfully. The only problem was that the french fry smell would make us hungry. :)

Try checking the fuel pressure. Make sure you hear the injectors pulsing during startup.

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Saturday, December 24th, 2011 AT 11:45 PM

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