[twinship]

Originally Posted by HTRules

OK, how's this for a big-time curveball from BMW? Yesterday I was told by my SA @ the local BMW dealership that as of two weeks ago (approx) the company now believes the entire HPFP problem is caused by faulty software, and there is a new fix/software upgrade that MUST be applied to the ECU before any hardware replacement can be done.

They said they've done two 335's so far and both are working (no long cranks, etc.) at this point.

The software upgrade literally takes all day and will, of course, overwrite my Dinan SII software, and the SA thinks that if I then go back to Dinan for an upgrade there, and my HPFP subsequently fails, BMW will blame the failure on Dinan's software any will probably refuse to warranty any repair.

I'm going to talk to Dinan next week and get their take on this, but at this point I feel caught in a hell of a bind.

Whaddya think?
Rick

Wow, the 4-year-old HPFP problem is a software issue?

If true, that's huge.

As someone who's considering a GIAC tune, it's not good news for me, since presumably whatever the improvement is in the OEM software it isn't part of the GIAC software.

Sheesh...

[Ironring Racing]

That sucks.

Just had my original pump replaced yesterday, along with a software update. New pump part number. SA said it was ISTAP 37.

As part of the service printout they describe that the software update has to be done first, then if the problem continues the perform a pressure hold test on the LP and HP fuel pumps. The LP held, the HP didn't, so it was replaced. Possibly if the HP had help pressure they wouldn't have replaced it after the software update?

[blisstik]

You can't assume this. I think GIAC only alters the performance parameters of the software and leave everything else stock, which is why they recommend you get the latest BMW software before applying theirs.

I'm sure Austin@GIAC would be able to explain better. Just because its a flash, doesn't mean it flashes the entire ECU.

Originally Posted by twinship

Wow, the 4-year-old HPFP problem is a software issue?

If true, that's huge.

As someone who's considering a GIAC tune, it's not good news for me, since presumably whatever the improvement is in the OEM software it isn't part of the GIAC software.

Sheesh...

[huyner328]

Seems a bit far fetched, one pays a premium for Dinan for that exact reason that they're trying to use against you. What a facepalm moment, best of luck Rick.

[Syndicategt]

I had my car in last weekend. BMW just updated my software but not my fuel pump. I still get longer than normal cranks 2-3 seconds, but seems to be fine other than that. Better than my 5-7 second cranks.

[335e92tx]

Actually my SA did say they normally start with trying a SW update. But when I called later he said it does need a pump.
So sounds doubtful that the SW was the majority of the problems... wishful thinking on their part im sure.

[Ironring Racing]

Good news (for me at least!).

As above, got my software updated and the new Continental made HPFP put in on Thursday, along with the software update.

Long cranks obviously went away, but 2 other unexpected things improved. The new software has completely eliminated the wastegate rattle, while the lag is almost non-existent as others have stated with the new software, but the complete elimination of the rattle was a pleasant surprise.

And the HPFP ticking that's mostly heard from the front passenger corner of the car, that's always been there, but had gotten worse as the HPFP died, is almost completely gone! As in, way better than it was brand new! The new pump design is much quieter!

Anyway, so far so good, but those 2 improvements were a pleasant surprise. I'm not slightly embarassed anymore when standing beside the idling car and all it's previous sick-sounding noises, or somebody thinking it was a diesel as I back up and the wastegates rattle away.

[themyst]

Had one HPFP go around 5800 miles, 17.5k miles now, zero issues of any kind.

[Euro_E93]

Anyone with the new pump (943) that failed?

[Donald-335i]

Originally Posted by themyst

Had one HPFP go around 5800 miles, 17.5k miles now, zero issues of any kind.

good to here.

[bulldog_yyc]

Originally Posted by Ironring Racing

Good news (for me at least!).

As above, got my software updated and the new Continental made HPFP put in on Thursday, along with the software update.

Long cranks obviously went away, but 2 other unexpected things improved. The new software has completely eliminated the wastegate rattle, while the lag is almost non-existent as others have stated with the new software, but the complete elimination of the rattle was a pleasant surprise.

And the HPFP ticking that's mostly heard from the front passenger corner of the car, that's always been there, but had gotten worse as the HPFP died, is almost completely gone! As in, way better than it was brand new! The new pump design is much quieter!

Anyway, so far so good, but those 2 improvements were a pleasant surprise. I'm not slightly embarassed anymore when standing beside the idling car and all it's previous sick-sounding noises, or somebody thinking it was a diesel as I back up and the wastegates rattle away.

[Hyper psi-atic]

Had 1 HPFP replaced in January at 6K miles, and car is in service now at 9k miles with same symptons. Long crank for 2 weeks, SES light came on for 2 days and went off later. Decreased power but no Limp Mode.

Got a call from SA just now and she said they are doing the software upgrade, but NOT replacing the HPFP.

I was thinking that the more people that attempt to go after the Lemon Law and try to get replacements or refunds after the 3rd time, BMW will make a lot more certain they fix this problem, so I am trying to go for that.....BUT what if they dont replace the HPFP? If they say "oh it wasnt your HPFP this time you needed a software update". Does that mean they can write it up as something different and dont get hit with a 2nd HPFP failure?

This sucks. I can just imagine another 3k miles and the same symptoons and bringing it in and them being like ok now we are going to replace your HPFP, but this is only your second time. Damn I want BMW to give me a new car for my troubles! haha

[fisherbln]

Had the 943 pump installed less than 2 weeks ago. The car went into limp mode again today with a check engine light. I've already dropped it off at the dealer and they'll diagnose it on Monday. Based on symptoms I would bet it is the fuel pump, but we'll see. This will be my 5th HPFP if it is indeed the problem.

[bulldog_yyc]

Originally Posted by fisherbln

Had the 943 pump installed less than 2 weeks ago. The car went into limp mode again today with a check engine light. I've already dropped it off at the dealer and they'll diagnose it on Monday. Based on symptoms I would bet it is the fuel pump, but we'll see. This will be my 5th HPFP if it is indeed the problem.

WOW! please keep us posted of what happens

[Tulsadriven335]

Originally Posted by fisherbln

Had the 943 pump installed less than 2 weeks ago. The car went into limp mode again today with a check engine light. I've already dropped it off at the dealer and they'll diagnose it on Monday. Based on symptoms I would bet it is the fuel pump, but we'll see. This will be my 5th HPFP if it is indeed the problem.

why didnt you lemon law it after the third HPFP, or the 4th failure...? you should def. lemon law it if youre on 5..IMO..

[roho3323]

Originally Posted by fisherbln

Had the 943 pump installed less than 2 weeks ago. The car went into limp mode again today with a check engine light. I've already dropped it off at the dealer and they'll diagnose it on Monday. Based on symptoms I would bet it is the fuel pump, but we'll see. This will be my 5th HPFP if it is indeed the problem.

Are you running a tune when you go into limp or are you perfectly stock? I just replaced my HPFP last week with the new part number and have went limp a couple of times, though I do run Procede...I always assume its my tune.

[bobbyd1961]

that fuel pump is the reason i now drive an M3 thanks BMW for a lousy fuel pump on the 335. and thanks for not being able to fix it. if you were able to fix it id still be driving my 335 and not my dream car M3

[fisherbln]

Originally Posted by fisherbln

Had the 943 pump installed less than 2 weeks ago. The car went into limp mode again today with a check engine light. I've already dropped it off at the dealer and they'll diagnose it on Monday. Based on symptoms I would bet it is the fuel pump, but we'll see. This will be my 5th HPFP if it is indeed the problem.

I would love to lemon it but I'm not the original owner. From what I can tell, lemon law only applies if you bought the car new. The car has had 5, I have only replaced it twice.

The car is stock with no tune. I'm hoping that it isn't the pump this time. We'll see what they say on Monday. I'll keep you up to date as I find out more.

I drove my E36 M3 today and I'm actually starting to wonder why I'm giving up the reliability. The M3 is plenty fun, just not as fast or modern. I hope that BMW can finally fix it this time because I'm starting to have doubts.

[sandare]

i had my third pump installed about a month and half ago. it's the 943. no issues so far. i can tell when it's starting to die in the morning when starting the car, it doesn't start right away... especially after a harsh night driving. i have around 23k miles.

keep us posted we are all interested in what they found out. our hope was that they fixed the problem with the 943!

[fisherbln]

Just got my car back and IT WAS NOT THE FUEL PUMP! Actual diagnosis was the vanos solenoid (exhaust side) was clogged.

[sandare]

excellent so far i haven't heard any of the 943 fuel pump failure

[midlife]

Originally Posted by Ironring Racing

Good news (for me at least!).

As above, got my software updated and the new Continental made HPFP put in on Thursday, along with the software update.

Long cranks obviously went away, but 2 other unexpected things improved. The new software has completely eliminated the wastegate rattle, while the lag is almost non-existent as others have stated with the new software, but the complete elimination of the rattle was a pleasant surprise.

And the HPFP ticking that's mostly heard from the front passenger corner of the car, that's always been there, but had gotten worse as the HPFP died, is almost completely gone! As in, way better than it was brand new! The new pump design is much quieter!

Anyway, so far so good, but those 2 improvements were a pleasant surprise. I'm not slightly embarassed anymore when standing beside the idling car and all it's previous sick-sounding noises, or somebody thinking it was a diesel as I back up and the wastegates rattle away.

what production month and year are you ?
i am impressed u say that there is no real lag AT ALL !
do u know the software update version number ?

thanks