BMW 120d M Sport (E87) fuel pump or gearbox?

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rjstua
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BMW 120d M Sport (E87) fuel pump or gearbox?

Post by rjstua » Fri Jul 13, 2018 12:59 pm

Hi everyone,

Longtime lurker, first time poster! I am hopeful that the issues I'm having with my car will ring a bell with one of you helpful lot!

My car went in due to the HPFP dying whilst driving and I broke down near a local garage. The garage had to remove the auto gearbox to get to the HPFP, which was replaced, and then returned the car to me. It literally broke down a mile down the road from the garage with an auto gearbox warning light! So, the garage sent the car off to a local auto gearbox specialist in West Mersea who repaired/refurbished the box(with a 1yr/12k mileage warranty), and have now returned the car to me again.

Whilst the garage were test driving my car(after the HPFP and gearbox repair), a code popped up relating to "fuel pressure implausible" (I don't have the code to hand but have a Carly OBD reader coming next week), the car continued to drive ok I am told. The code was cleared and test driven again, only for the code to pop up again. They turned the engine off and on again and the code cleared itself. Just a bit weird!? I'm now concerned that I have a LPFP or fuel pressure sensor problem.

I have test driven the car myself since yesterday, and the code didn't pop up. However, the car appears to drive differently now. The gear changes are not as graduated as they used to be, they are clunkier, and it seems to rev a bit more before engaging in gear(almost like a clutch slip I guess), seems a bit hesitant in deciding which gear it wants to use etc. I'm honestly not really happy with it at all! It's just not as nice and fluid as it was before it went in. Is this just to be expected as he gearbox has been opened up and played with?!

:(

Rob.

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Nottsknots
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Re: BMW 120d M Sport (E87) fuel pump or gearbox?

Post by Nottsknots » Fri Jul 13, 2018 1:40 pm

Not sure exactly which gearbox you've got in there, but depending on what they did to "repair/refurbish", the electronics may have been reset, and need to relearn your driving style. Read about half way down this.
https://www.newtis.info/tisv2/a/en/e87- ... le/1yrEeuw

Fuel pressure could be as you suggest, but need codes to know anything really. Anything else is speculation.
E87 118d, stock, plus PDC control unit drain, Parrot, debadged, Mothercare baby shades (but no babies), and occassionally a good layer of wax. Instantly forgettable, and thats the way I like it.

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Re: BMW 120d M Sport (E87) fuel pump or gearbox?

Post by marco_polo » Fri Jul 13, 2018 1:48 pm

When was the fuel filter last changed?
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rjstua
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Re: BMW 120d M Sport (E87) fuel pump or gearbox?

Post by rjstua » Fri Jul 13, 2018 2:09 pm

Nottsknots, thanks for that, so would it be pointless me trying to reset the adaptive driver memory and just wait for it to re-learn? How long does that usually take?

marco, the fuel filter was done on the last service in Feb this year.

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Re: BMW 120d M Sport (E87) fuel pump or gearbox?

Post by Nottsknots » Fri Jul 13, 2018 3:05 pm

rjstua wrote:
Fri Jul 13, 2018 2:09 pm
How long does that usually take?
I honestly have no idea. I've seen opinions that it takes the first 1k miles, but not seen any documentation to confirm that, nor experienced it myself.
E87 118d, stock, plus PDC control unit drain, Parrot, debadged, Mothercare baby shades (but no babies), and occassionally a good layer of wax. Instantly forgettable, and thats the way I like it.

rjstua
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Re: BMW 120d M Sport (E87) fuel pump or gearbox?

Post by rjstua » Mon Jul 16, 2018 12:57 pm

Cars going in to the BMW garage for diagnosis this week, I'll update as and when I know more!

rjstua
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Re: BMW 120d M Sport (E87) fuel pump or gearbox?

Post by rjstua » Wed Jul 18, 2018 1:56 pm

BMW have leak tested the injectors, no fault found. The only thing they did find was a non-genuine fuel filter that was in a poor condition. I'm surprsied that the original garage(non BMW indy) didn't spot this?!

The auto gearbox has had the oil replaced (again) and the parameters reset and has been deemed to be fine. Apparently this has helped a little, but the tech advised that the gearbox is not as sharp as it should be, but they could only recommend a complete replacement at this point. Obviously not worth it for the age and value of my car!

They now cannot release my car as it has an outstanding recall (positive battery terminal) which they don't have parts for yet, so now I'm getting an Enterprise rental FOC until it's sorted :lol:

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