[MysticRob]

Originally Posted by DC441

Haha yeah I was going to try and do a reply all just wasn't sure of an easy way doing it from my phone.

So I have an idea to rule out the turbos and will see if you guys agree...

If I disconnect the vacuum lines from the wastegates and tee them together to my vacuum bleeder with a long enough hose to route it into the car. Go for a VERY gentle short ride and manually shut the wastegates with the bleeder. If I build any boost above 0 at all it will have surpassed anything I've previously gotten. I'll definitely be gentle on the throttle and release the wastegates if anything gets too high for my liking. I'm just thinking this test would rule out a bad turbo.

Thoughts?

Never thought about posting via my phone, I'm always on a laptop at work. LOL

All things being equal, unless you have massive oil consumption, or strange noises, wastegate rattle, actuator rod binding, etc, I seriously doubt you have problems with even one turbo, let alone both of them. You said in your 1st post that you applied ~6" hg and the wastegates moved fully, so sounds like the most common problem isn't occurring on yours and they're likely working fine.

Since you just bought the car a month ago, and it already had the 30FF code, I wonder just what the previous owner did while he had it. It's possible he had it modded, and maybe removed or changed something before supposedly putting it back to stock? I could be recommending things based on erroneous assumptions.

Are you sure it has the stock tune, DPs, etc? I'd be curious if there's JB4 or Procede wiring still hanging around in the DME box.
Assuming all the vacuum connections are functioning properly, and you possibly have a custom tune on it you don't know about, what happens if you load Stage 0 on MHD?
Are you absolutely sure you've run all the vacuum lines correctly? How about the diverter valves and intake hoses?
Your other codes are coming up as TMAP sensor issues. Wonder if it's dirty and just needs cleaned, is bad, non-OEM, etc.

It's just very difficult to troubleshoot remotely not hovering over your engine bay, you know?

[MysticRob]

OP, any updates on this? Just dug it up when I saw another thread on the same codes.

[MMM335]

i have the same problem constantly since going stage 2. happens 4th gear WOT.

[DC441]

Originally Posted by MysticRob

OP, any updates on this? Just dug it up when I saw another thread on the same codes.

I hooked up a vacuum bleeder directly to the wastegates and pulled about 20inHg and drove around to see if this would show me any boost and still got nothing. So I think I can at least rule out the vacuum pump being bad.

I also tuned it yesterday to stage 1 MHD tune in an attempt to see if a higher boost target would help up the actual boost. But no luck still hitting essentially 0psi. Highest it got was 0.9psi for a split second.

[Midwest_Xi]

U pop the DME box, maybe there is a jb4 still on car?

Are u throwing a CEL

[DC441]

Originally Posted by Midwest_Xi

U pop the DME box, maybe there is a jb4 still on car?

Are u throwing a CEL

No CEL, just the 30FF code. I did get 2ABC and 3100 also after repeated runs with the limp mode already on, but those seem to have gone away.

I still have to check the DME box. Haven't had much time to work on it lately.

[STR8-6IX]

Originally Posted by rhm135

I wrestled with a stock E90 335i at work with 100k on it having the same issue and it ended up being clogged secondary cats.

+1, OP's symptoms sound like exactly this.

[DC441]

Originally Posted by STR8-6IX

+1, OP's symptoms sound like exactly this.

To check the secondary cats just disconnect the midpipe at the downpipe connection and drive around? How would I check the cats in the downpipes?

[STR8-6IX]

Originally Posted by DC441

To check the secondary cats just disconnect the midpipe at the downpipe connection and drive around? How would I check the cats in the downpipes?

the one time i heard of this issue, the person in question had catless downpipes meaning all the burnt oil and shit was going straight into his secondary cats.

so, you can probably assume that your primary cat is clogged too. I would just delete the secondary cats all together to start off with (you really dont need them and can still pass emissions without them)

if this does not fix the problem, you may need to change the downpipe. I also recommend switching to a good quality 5w40 like liqui moly or motul to help slow oil burning and ensure this problem does not come back in the future.

[Chappers 71]

my 30ff was caused by the clamps connecting the turbos to the charge air manifold, had them replaced & all was well.

[AWF10M5]

I have 3100, 30ff, haven't replaced or checked anything yet but my leaking injectors ruined my cat. I wouldn't be surprised if my secondary cats are clogged but i still build boost but anything WOT triggers the lights.

Keep us updated

[DC441]

Had a bit more time to work on it this morning. Adjusted the rear wastegate to the point that it doesn't rattle anymore. Fixed the rattle but still no boost. Disconnected vacuum lines to front turbo and drove around to see if the rear would work alone, but got no change. Did the same thing isolating the front turbo, and no change either. I'm mistaken that the 2ABC and 3100 had gone away as just pulled codes again and they are still there.

I think my next step will be replacing the TMAP sensor to see if thats the issue since that seems to be what the 2ABC implies.


Also I did open up the DME box to check for a jb4 or other piggyback​ modules and didn't see anything modified in there.

[nukezero]

Search.

I had the 30ff problem at 124k miles 2009 335i bone stock. It was the turbo wastegates. The wastegates get stuck, and you can't build boost. The 2nd turbo can't do anything. They both need to work to build boost. My front turbo wastegate got stuck. The rear was okay. I ended up replacing both turbos and a host of other stuff along the way so I don't have to do it again since the subframe has to drop. Some of the things I replaced together were: oil pan gasket, engine mounts, water hoses, oil lines, etc.

See the entire thread here. I went thru all the same problems/fixes you did (vacuum hoses, boost solenoids). Eventually, it was the turbos. You're looking at $3-4000.

http://www.e90post.com/forums/showth...highlight=30ff

[Ocharlas]

Did you wind up solving this? I had a similar 30FF I couldn't get rid of, tried everything. Finally took it to a BMW shop for diagnosis - yes indeed, you need new turbos, they said.

So in my garage, on jackstands, for a month, I replaced the turbos. Awful experience. But you know what?

It wound up being the HPFP...

I don't think it's super common, but I guess it does happen

[DC441]

So just to close this thread out to anyone searching. ended up replacing the turbos. Both wastegate bushings were totally worn out and would not close properly. Got the new ones installed around September last year and has been running great ever since!

[feuer]

Originally Posted by DC441

So just to close this thread out to anyone searching. ended up replacing the turbos. Both wastegate bushings were totally worn out and would not close properly. Got the new ones installed around September last year and has been running great ever since!

Who did the install?

[DC441]

I did the install. Took about 20 hrs. Replaced the oil pan gasket while I was in there as well so that added some extra time.

[Socaln54]

Originally Posted by DC441

I did the install. Took about 20 hrs. Replaced the oil pan gasket while I was in there as well so that added some extra time.

which turbos if you don't mind me asking?

[Damirnuh22]

A little background info
So I purchased my n53 335xi late June and the car was running perfect it has 118k miles and it has dual air intakes and a catless down pipe I bought the car with all the mods done on it it's tuned on jb4 , but one day I was casual driving not pushing the car and I decided to push on it and I noticed that I wasn't getting any boost at all and then it gave me the reduced power sign so I limped it back home , I checked my vacuum lines there not tangled at all , when I used to drive it yiu could hear the turbo spooling at 2k to 3k rpm but now you can't hear a spool at all I was thinking it could be my air intakes not being connected all the way in the charge pipe seems fine really wanting my car to hit boost again anybody know why ?

[Saif2018]

Originally Posted by DC441

Some quick background.

2009 335i AT 99k miles, totally stock.

I just bought the car a little over a month ago, got it for pretty good price since it had the 30FF issue at the time and the owner had no plans on fixing it. Upon inspection I noticed the intercooler had some damage and a small hole in it. I figured great I'll fix that and all will be good and I'll have gotten a great deal! That unfortunately has not been the case.

So far I've done the following:
- replaced intercooler with used stock one from another forum member
- replaced all vacuum lines with silicone lines from Verocious Motorsports
- replaced both boost solenoids
- pressurized system and didn't find any leaks
- took off charge pipe and pressurized it and checked diverter valves
- pulled vacuum on waste gates and both moved fully at about 7inHg vacuum

The car is basically not making any boost, struggles to get above 0psi and falls into limp mode under medium to full throttle around 3-4k RPM. If you just drive around normally light throttle it drives fine.

Codes:
30FF
3100
2ABC

Predominant code is 30FF, 2ABC & 3100 came up after repeated data log runs and I was flooring it even after limp mode was triggered. They went away actually but the 30FF is always there once limp mode kicks in.

See link below for data log. I can run more if you guys need more info or want to see something else.

http://datazap.me/u/dc441/3-4-17?log...a=3-5-23-26-28




Open to any and all suggestions.




-

Follow this guide,

https://bmwtuning.co/bmw-n54-30ff-en...-repair-guide/

If everything checks out, your turbos are probably shot.