[Joeb427]

Why aren't all the HPFP's failing?
Why is it only small percentage of N54's?
It is a small percentage because if it was a high percentage,there would be articles in major auto magazine and TV reports.
Can't really go by forums for a number.Many people come to forums to vent.
Every vehicle forum has owners bitching about their vehicle's issues.
Some say it's ethanol fuel.Ethanol is sold all over.
I guess the biggest question is why can't the pump be fixed?How hard can a fix be when you have plenty of vehicles out there with both low and high performance engines without a fuel pump issue.
I can see if there was a engine design problem but a friggen fuel pump?

[3me]

you know what i was about to ask the same question but you already posted it...HPFP...i have a 325i but EVERY OTHER thread on this forum deals with hpfp. Even though it is a small percent...it is an incredibly high percent for one part of one car to be failing...as many as 4 times on a car..the same problem. exactly why do these hpfps suck so bad? i have never heard of them being an issue with any other turbo car ...well ever. all of my friends drive turbo cars and not a one has had fp issues. Why are they so unreliable? WHY cant they make a hpfp that is more reliable? or is there an aftermarket one? maybe we should get honda to make us one. maybe it will work

[D.B.S]

Another question to add to the fire, why is it that some fail after 2500 miles, and others don't fail till 40k miles? And some that don't fail at all... Is it luck of the draw? Are some owners luckier than others? And you can't blame the tunes for the failure, because many owners are failing without tunes... So where does the issue truly lie?

[JBiddy]

.

[3me]

haha i mean it is a PUMP it has one damn job to do in the WHOLE car and it technically turns a large volume of cars into lemons just because of it.

[kyleb350]

Regarding the possibility of it being due to the high ethanol content, I remember seeing someone posted a map where they use the 10% ethanol content. It was the 5 or 6 bigger metropolitan areas in the country (NYC, Chicago, LA, Dallas, etc). What I'd like to know is the number of people outside these areas getting the HPFP issue...

[3me]

Originally Posted by kyleb350

Regarding the possibility of it being due to the high ethanol content, I remember seeing someone posted a map where they use the 10% ethanol content. It was the 5 or 6 bigger metropolitan areas in the country (NYC, Chicago, LA, Dallas, etc). What I'd like to know is the number of people outside these areas getting the HPFP issue...

Regardless...i dont see any other fuel pump failing this miserably on any other car. i mean i dont even have a 335i i just here about the fuel pump all the time and i mean there are plenty of smart people out there with this engine..can we figure out what goes wrong? i have heard something about seals and ethanol as well...but why do some people go through 4 hpfps...i know i am beating a dead horse but i just want to know why? and why cant we make one that is calibrated to handle that type of gas? If an abrams tank can burn anything from jet fuel to cooking oil to keep it going...i think bmw should give its customers a car that can handle a little bit of ethanol. sheesh

[kyleb350]

True. Are there any other turbo direct-injected cars on the market? just curious...

[Joeb427]

Originally Posted by kyleb350

True. Are there any other turbo direct-injected cars on the market? just curious...

Doesn't the new 750 with it's V8 have twin turbos with direct injection?
I wonder what HPFP is in that car.

[Delta0311]

Originally Posted by kyleb350

True. Are there any other turbo direct-injected cars on the market? just curious...

Aren't the the turboed Audis direct-injected?

[3me]

yeah audis and Volkswagens. And porsche is coming out with theirs this year i believe. Just a quick research there are probably a few more im sure

[3me]

Originally Posted by Joeb427

Doesn't the new 750 with it's V8 have twin turbos with direct injection?
I wonder what HPFP is in that car.

NICE call! just found this thread at 7post http://www.7post.com/forums/showthread.php?t=276193 a brand new 7 series with just over 1000 miles on it just had their hpfp go out

[Delta0311]

Yup 750i turboed

4.4-liter, 32-valve 400-hp turbocharged V-8 engine with twin- turbo technology, piezo fuel injection, 4 overhead camshafts, and Double-VANOS steplessly variable valve timing


And what the hell is "piezo" fuel injection?

[3me]

It is something that siemens produces...the same people that produce the hpfp that goes out on average every 3 seconds around the world

[markinva]

Originally Posted by 3me

NICE call! just found this thread at 7post http://www.7post.com/forums/showthread.php?t=276193 a brand new 7 series with just over 1000 miles on it just had their hpfp go out

that one failed at 1100 miles and again at 2100 miles

I've heard similar stories with the 3 series hpfp.

Pathetic...

[Bimmerista]

I first thought it was the ethanol content in US gas - but hpfp failures have occured in Canada as well - and, until next year, we don't have ethanol in our fuel supply system.

I believe that the culprit is (slightly) higher permitted sulphur content in North American (USA and Canada) fuel. An article I read (sorry don't remember where) about future plans by BMW, hinted at this issue, as the article mentioned that the next generation turbo 6 (the fameous N55) will have a single turbo and will have (apparently) an hpfp which is adapted (designed) to the higher North Americal sulphur content. Audi adapted their hpfp design....

So there, why some? probably because the sulphur content difference is quantitatively statistically significant without being fundamentally greater - but I really don't know. All I know is that until this is solved I am staying away from the N54 engine.

[Delta0311]

Originally Posted by Bimmerista

I first thought it was the ethanol content in US gas - but hpfp failures have occured in Canada as well - and, until next year, we don't have ethanol in our fuel supply system.

I believe that the culprit is (slightly) higher permitted sulphur content in North American (USA and Canada) fuel. An article I read (sorry don't remember where) about future plans by BMW, hinted at this issue, as the article mentioned that the next generation turbo 6 (the fameous N55) will have a single turbo and will have (apparently) an hpfp which is adapted (designed) to the higher North Americal sulphur content. Audi adapted their hpfp design....

So there, why some? probably because the sulphur content difference is quantitatively statistically significant without being fundamentally greater - but I really don't know. All I know is that until this is solved I am staying away from the N54 engine.

I'm going to upgrade in 2012 or 2013 my original choice was a 335i but I rather stay with a naturally aspirated engine. So I decided to put together a bigger down payment and get a M3; screw it that's what I really, really, really want anyway.

[Joeb427]

Originally Posted by 3me

NICE call! just found this thread at 7post http://www.7post.com/forums/showthread.php?t=276193 a brand new 7 series with just over 1000 miles on it just had their hpfp go out

The flagship $100K vehicle with a HPFP problem.
It will be fixed now.

[3me]

haha yeah it will. there are probably 2000 of those cars on the road if that...how many n54s are out there?

[Bimmerista]

Originally Posted by Delta0311

I'm going to upgrade in 2012 or 2013 my original choice was a 335i but I rather stay with a naturally aspirated engine. So I decided to put together a bigger down payment and get a M3; screw it that's what I really, really, really want anyway.

I hear you. I am renewing within the next 6 months and, right now, I am not willing to commit to the higher price of the M3. However, had this hpfp issue not been present, I would have been looking at getting the N54 engine (either the 3 series or the 1 series). But as it stands, I am sticking to the normally aspirated in-line 6 for the next one.

[Joeb427]

Originally Posted by Bimmerista

I hear you. I am renewing within the next 6 months and, right now, I am not willing to commit to the higher price of the M3. However, had this hpfp issue not been present, I would have been looking at getting the N54 engine (either the 3 series or the 1 series). But as it stands, I am sticking to the normally aspirated in-line 6 for the next one.

Then do yourself a favor and don't test drive the 335.
You drive,you buy it.

[DenverJayhawk]

Originally Posted by Delta0311

Aren't the the turboed Audis direct-injected?

Yes, the 2.0 T is direct injected. Hell, even Ford's Ecoboost is a turbo DI engine and they got it figured out.

BMW better figure this out once and for all if this is true.
http://www.autoblog.com/2009/07/21/r...d-back-to-u-s/