[Big Tom]

Originally Posted by meyergru

Nope. Actually, it's the other way round: The rattle-fixing v29.2 was invented because of the mechanical wastegate problem. It simply masks rattles by keeping the wastegates open, which causes lag.

If you disable the rattle-fix by specifically requesting the lag-fix (aka wastegate conversion), you are actually more prone to rattle because it is not masked any more.

The only way to have no rattles and no lag with your build date is the new software with the wastegate conversion option selected and - this is the important part - getting the mechanical problem fixed. Good luck with the last one.

My car is built in October 2006 and I got the latest software installed today.
My turbos is replaced a year ago and I have no rattle.

Question: Do I have to tell the BMW tech to manually activate the Lag-Fix option in the software?
Which setting is the default setting? (Lag-Fix or Rattle-Fix?)

[meyergru]

Both of these answers valid for your build date:

Originally Posted by Big Tom

Question: Do I have to tell the BMW tech to manually activate the Lag-Fix option in the software?

Yes.

Originally Posted by Big Tom

Which setting is the default setting? (Lag-Fix or Rattle-Fix?)

Rattle-Fix.

[Big Tom]

Originally Posted by meyergru

Both of these answers valid for your build date.

Why is s the build date of the car important?
Isn't the build date/version of the turbos and wastegates the most important thing to know in this case?

[335iSSA]

Originally Posted by Big Tom

Why is s the build date of the car important?
Isn't the build date/version of the turbos and wastegates the most important thing to know in this case?

IMO the reason this is important is because BMW only offers this option to those owners who had purchased their cars with pre 29.2 software, meaning that they were bringing the performance of the car back to where it was when they purchased it. If you bought a car with the rattle fix (lag) in place (presumably after a 09/07 build) then you don't notice the difference because BMW already de-tuned your car. The reality is that the wastegate retro brings the car close to the pre 29.2 behavior. The pre 29.2 software had a WG duty cycle of ~70 and the new "rattle fix" software has a WG duty cycle of ~20, where as the "wastegate conversion" software has a WG duty cycle of ~50. I posted some BT cable logs on this some time this past summer.

Cheers

[Big Tom]

Bad news.

My car rattles with the latest software!
I'm coming from an early software from October 2006 and I have never experienced any rattle before.

If I turn my PROcede to map 1 (with built in Rattle Fix) the rattle goes away, but when I activate map 0 the rattle is there again!

I don't really know what to do now... Maybe try to get my BMW tech to downgrade only the ECU software...?

I will post a video with the PROcede Rattle Fix enabled/disabled.
This thing really works! Good job Shiv.

[meyergru]

Originally Posted by 335iSSA

IMO the reason this is important is because BMW only offers this option to those owners who had purchased their cars with pre 29.2 software, meaning that they were bringing the performance of the car back to where it was when they purchased it. If you bought a car with the rattle fix (lag) in place (presumably after a 09/07 build) then you don't notice the difference because BMW already de-tuned your car.

Not quite. The build date is important, because BMWs diagnostic software ISTA/P has to automatically discriminate between possibly-flawed cars and cars that are fine in order to choose a default behaviour.

The rattle fix will be applied per default only to cars that could be flawed, i.e. before 10/07. Those cars will be have the wastegate conversion (aka lag-fix) option in the ISTA/P menus. All others get the normal behaviour (i.e. lag-fix) and cannot choose at all in the ISTA/P menus.

That is, cars with build dates from 10/07 never have a lag problem, at least from DME software 32.1 and on.

Of course, discrimination by build date is only a crude guess about actual rattling, because some cars build before the critical date already have new wastegates (like mine), others have gotten their parts replaced afterwards (like yours) and still others have not yet developed rattles over time.

With flawed hardware you only have the choice between lag and rattle. The best way is getting your hardware fixed and choose the wastegate conversion afterwards in order to have the best of both.

Originally Posted by Big Tom

Bad news.

My car rattles with the latest software!
I'm coming from an early software from October 2006 and I have never experienced any rattle before.

I don't quite believe that. It seems that this is somewhat distorted by either:

a) you have a Procede
b) you may have gotten updated with a rattle-fixed DME software without knowing when you got the new turbos (standard procedure).

If you still had software from October 2006, and your flawed hardware had developed rattles, you would have noticed it.

In that case, a newer software without an explicit wastegate conversion would have masked the rattle, not brought it up. If it rattles now, it is likely to have the wastegate conversion selected.

Whatever, you definitely have a hardware problem and you can only choose between lag and rattles by software. Forget about the DME software downgrade. Anything that can be done by software is available via your Procede already.

Get the flawed wastegate hardware fixed. Try pointing your dealer at SIB 11 13 07 - and good luck explaining the Procede's role in your case.

Since your turbos have been replaced already (I assume the wastegate rods are the newer ones), it seems that with the rattle-fix in place, your dealer did not properly adjust the wastegate rods so that the wastegates are not fully closed in "closed" position now. A readjustment should fix that.

[Big Tom]

Originally Posted by meyergru

I don't quite believe that. It seems that this is somewhat distorted by either:

b) you may have gotten updated with a rattle-fixed DME software without knowing when you got the new turbos (standard procedure).

No. My software is untouched since 2006. It's also documented in the test protocol which shows the software status before- and after the update.

Originally Posted by meyergru

If you still had software from October 2006, and your flawed hardware had developed rattles, you would have noticed it.

Nope. The rattle is so noticeably now that it's impossible to miss it...

Originally Posted by meyergru

Forget about the DME software downgrade. Anything that can be done by software is available via your Procede already.

If I want to sell the car in the future and decides to disassemble all the mods, the car will start to rattle as soon as the PROcede is out.
Rattle is never a good selling point...

Originally Posted by meyergru

Since your turbos have been replaced already (I assume the wastegate rods are the newer ones), it seems that with the rattle-fix in place, your dealer did not properly adjust the wastegate rods so that the wastegates are not fully closed in "closed" position now. A readjustment should fix that.

Will check that out with my dealer.
Thanks for the tip.

[powerbarsk8ter]

Is this how BMW attracts new customers by alluring them with an lagfree car and then flash the car into a regular car, that would be sneaky.

[335iSSA]

Originally Posted by meyergru

Not quite. The build date is important, because BMWs diagnostic software ISTA/P has to automatically discriminate between possibly-flawed cars and cars that are fine in order to choose a default behaviour.

The rattle fix will be applied per default only to cars that could be flawed, i.e. before 10/07. Those cars will be have the wastegate conversion (aka lag-fix) option in the ISTA/P menus. All others get the normal behaviour (i.e. lag-fix) and cannot choose at all in the ISTA/P menus.

Understood, but this cut-off is selected because they introduced upgraded hardware and software and the default software at the time was the 29.2 software (or later) was the standard software on all new builds. Just b/c they upgraded the hardware doesn't mean the rattle may not occur on cars with the upgraded hardware, as such the newer cars still got the rattle-fix software inorder to try to prevent the problem in the future.

Originally Posted by meyergru

That is, cars with build dates from 10/07 never have a lag problem, at least from DME software 32.1 and on.

They never have a lag problem noticable to "the most sensitive drivers" because they never experience the pre 29.2 software and don't know that there is actually lag which is introduced in the new software (29.2 or later) by leaving the wastegates open to supress the rattle. They offer the conversion to those of us with pre 09/07 builds because we have experienced the car with in it's full fury.

To address another comment by another user they don't do a bait and switch b/c if you had the early build car and notice lag the will re-program the WG DC tables to give you the old behavior, almost that is.

Originally Posted by meyergru

You may have gotten updated with a rattle-fixed DME software without knowing when you got the new turbos (standard procedure).

If you still had software from October 2006, and your flawed hardware had developed rattles, you would have noticed it.

In that case, a newer software without an explicit wastegate conversion would have masked the rattle, not brought it up. If it rattles now, it is likely to have the wastegate conversion selected.

Whatever, you definitely have a hardware problem and you can only choose between lag and rattles by software. Forget about the DME software downgrade. Anything that can be done by software is available via your Procede already.

+1

Originally Posted by meyergru

Get the flawed wastegate hardware fixed. Try pointing your dealer at SIB 11 13 07

If you are still under warrenty then they may do this. All you need to demonstrate that the car rattles significantly on the new software with out the wastegate conversion. They should check the tolerence of the wastgate and if outside the spec they should replace...again. If you are not covered anymore then it sounds like time to upgrade to RB turbos.

[**335i**]

i see this topic never ends, my sa never updates my soft i say to them dont touch my ECU i have http://img186.imageshack.us/img186/8342/dataln9.jpg it seems that 29.1.1 is best soft no need any updates

SW
79.50.c1
Kodierdaten:08.13.0c.19
Conf. Prog:E89X-08-03-520

[Big Tom]

Here's my WG rattle, with the PROcede Rattle Fix on and off:

http://www.e90post.com/forums/showthread.php?t=461260

[AU335i]

hey guys, just buoght my car. its 2008 335i e92 6mt with iDrive. this is probably the only 335i i've ever been in so im not sure if i have the lag that you guys have been talking about in this thread, however, when i took it in the dealership they told me i have an software update or recall or something but i left without having it done.

just some quick facts about the car:
-Car was built at the end of 2007, not sure what month, but i know it was made before 2008, and the car only has 11,000 miles on it so i dont think it was serviced often at all.

i read somewhere you could have the bad update if your iDrive screen is Silver, but mine is still brown, does that mean i still have pre 29.2 software? if so i dont think im ever going to let them do an update, from the sounds of it seems like the lag makes the car a lot less enjoyable.

whenever i get a chance (been raining/snowing where i've been) im going to take my car out on the road and just do some test for that "lag".

what are the main signs that the lag is there?

[Amdahl]

Odds are your car has no lag. I think one big difference between pre-29.2 and what they are shipping today is this: The pre-29.2 has nearly full power/torque at almost any RPM, in any gear. The latest softwares do not, and seem to use higher RPMs and a downshift more often. This is for steptronic transmission cars.

[Jred22]

i have a 07 335i e92 with a build date of 09/2006. Should i have any worries regarding this?

[boostedtpa]

i am feeling lag too after i just test drove another e92 coupe

[Jred22]

Originally Posted by Jred22

i have a 07 335i e92 with a build date of 09/2006. Should i have any worries regarding this?

anyone?

[Unky]

Service centers are installing DME software version 40.2 now. Is this a major new upgrade or just just an incremental improvement between 39 and 40? Does anyone have any details about the new revision?

[bulldog_yyc]

Originally Posted by Unky

Service centers are installing DME software version 40.2 now. Is this a major new upgrade or just just an incremental improvement between 39 and 40? Does anyone have any details about the new revision?

bump for some feedback

[Jbabl]

Just picked up my car, updated to 40.2.0.1
I'll check it out to morrow-if there's any rattle or lag, I will be complaining and maybe asking to replace turbos if needed. I had the actuators replaced ut seems like most people who complained got new turbos/wastegates

[Kid Eh]

I just dropped my car off for a software update. It's an '09 e90 335i. I have yet to pick it up so I'm not sure what to expect. The guy on the phone said I went from version 08-09-530 to 10-12-503 when I asked about versions. Anybody know what these translate to? Should I be worried about anything? Thanks in advance.

[Pseudo Nim]

Originally Posted by Kid Eh

I just dropped my car off for a software update. It's an '09 e90 335i. I have yet to pick it up so I'm not sure what to expect. The guy on the phone said I went from version 08-09-530 to 10-12-503 when I asked about versions. Anybody know what these translate to? Should I be worried about anything? Thanks in advance.

10-12 means 2010/12, so the ISTA that was current at the time ... subrevision 503. I could be wrong, but I interpret that as ISTA 2.40.2.0.1, so you're getting 40.2.

[Kid Eh]

Originally Posted by Pseudo Nim

10-12 means 2010/12, so the ISTA that was current at the time ... subrevision 503. I could be wrong, but I interpret that as ISTA 2.40.2.0.1, so you're getting 40.2.

Cool. Thanks!!!