and the N55 hpfp issues begin

[hangover]

Originally Posted by MarkR171

The two people I talked to who have had HPFP replacements on the 135s don't see it as a big deal. They took the car in, got a replacement under warranty and continue to love their cars. Both are near 30k miles and have only had to replace the pump once. I can see why people would mark the "would buy again" box.

I've had one replacement in 2+ years the dealer handled well and the car runs fantastic. Hopefully by 100k miles they'll have some type of solution. In the meantime, the car is still a blast to drive. The worst part was the slow cranks for a couple months and limp mode. That sucks.

[shockin330i]

Originally Posted by Andrew@EMS

Haven't had a chance to look them up

2c90
2c57
Shadow
2bde
2bf0
2c57

how do you know if its a shadow/hidden code?

[desty]

I had my 2008 135i for 2 yrs , about 60 000 Km now and JB3 installed for 6months.

and never had any problem with the Fuel Pump so far.

i guess they dont know the problem!

[Andrew@ET]

Originally Posted by shockin330i

how do you know if its a shadow/hidden code?

I think it seperated the two.

[kc_skyrider]

Believe it or not when dealing with BMW NA your getting alot of transparency. Try talking to BMW in Germany about the poorly engineered HPFP. I went to get a software flash and when I pulled in, I set down a box. They asked what it was. I told them in the box is my first HPFP. The box itself has the part number for the one in the car now incase they need it for the flash. First question from the tech
"Is something not right with your original?" I said no it failed and I didn't feel like losing my car for a week by the time they finally fixed what was wrong so I replaced it myself. he responds with
"It is very unlikely your fuel pump has caused any problems, we have not seen this"
I can name three people off this forum that went to the same dealer and had a HPFP replaced before this. Also a guy with an ACS1 that had his fail in the first 3,000miles who dealt with the same tech that had "never seen this". Since I've asked 3 other dealerships and they say they haven't seen this problem while German members complain on the forums about having failures. They treat it like the war "It just didn't happen, I am not familliar with that" lol

[Frustration]

Classic...

Mods, Please Rename the thread "LET THE N54 PROBLEMS CONTINUE"

[JimmyT]

^^^^ X eleventybazillion!!!

[shockin330i]

15k miles and still rocking hard!

[M_Anthony]

Originally Posted by boostm3

Wouldnt that be ironic if it turned out to be the LPFP all along that was causing the problem?!

Honestly, a lot of guys have been suspecting that for quite some time, I wouldn't be surprised at all if it was. The HPFP has to be replaced when it goes, obviously, but after talking to various techs it seems likely that the HPFP is merely the symptom, not the cause.

That's why it probably doesn't matter than the N55 is running the same HPFP...

[CRuben09]

Sorry for reviving this topic, but my 2011 DCT N55 135i left me stranded with no preceding signals. The car was working perfectly I parked it outside for 15 minutes and when I went back it had hard time starting up, it was cranking and cranking as id it was flooded with gasoline. When the car finally started it sounded like a 91' Turbo Rotative Mazda. I tried to run with it, but within 50 feets or so, the engine just stopped and it didn't started again. It was cranking and cranking and all the warnings in the dash went on. Today I took it in. I'll keep you posted.

[CRuben09]

It is 26,000 miles now

[boostm3]

Well... it Could be the fuel pump (wink, wink).. But I hope not! I'd been hoping the N55 was relatively immune. Keep us apprised.

[Upora]

Those Audi responses are Blasphemous!!

Originally Posted by bryce

this is the first thread i've noticed about n55 hpfp problems. worth the read IMO

[BoostedBarrett]

So I am getting one of these shadow code faults. I have stage 2 mhd map custom tuned by wedge. If I go back to the stock map, where I am guessing the HPFP doesn't have to work as hard I don't get faults. Is this common?

[Luftmeister]

Originally Posted by BoostedBarrett

So I am getting one of these shadow code faults. I have stage 2 mhd map custom tuned by wedge. If I go back to the stock map, where I am guessing the HPFP doesn't have to work as hard I don't get faults. Is this common?

I have the exact same issue. I've not flashed back to stock yet so thanks for the tip. I'm running stage 1 and I've tried 91 and 93 maps. (running 93)

I'll share if I find anything! Good luck 007

[BoostedBarrett]

Originally Posted by Luftmeister

I have the exact same issue. I've not flashed back to stock yet so thanks for the tip. I'm running stage 1 and I've tried 91 and 93 maps. (running 93)

I'll share if I find anything! Good luck 007

I ended up changing the HPFP and later did coils and spark plugs and I don't have any codes coming up.

[Tallicia]

Well in December the HPFP was replaced and just 8 months later, it's dead. these units need a complete redesign. Why has there been no tear down to even identify what is causing them to fail?

Is it seals?

Is it some internal spring or valve or diaphragm failing?

Why are they failing?

I would expect someone would know the failing parts and there would be a rebuild kit with better pieces so it lasts. They are on hundreds of thousands of motors around the world, why can't a dependable unit be made, or the aftermarket make this happen!?

[Xer0449]

(for the late e-series guys)

I'm running this HPFP: http://tuningtechfs.com/ttfs-n55-hig...p-single-pump/