BMW Boost Leak? How To Check That 30FF Code!

In this video, I’ll share just how to check to see if you have a boost leak on your turbocharged BMW! BMW Boost leak? How to that 30FF code!
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[@BMWFanatic]

CLICK HERE for my BMW Fanatic Amazon recommendations that I’ve tested on this channel! Thanks for the support! 👉🏻www.amazon.com/shop/bmwfanatic

[@buzz-lh6rc]

I was getting 30FF and I have 220K miles on my '08 n54. I was hoping it would be anything but replacing the turbos. I checked the vacuum lines you said to check. One of the two that are on top of the motor in the front was cracked right were it connects to the hard plastic tube going to the vacuum cannisters. Under $10 in vacuum line and 30FF is gone! Thanks man!

[@KatrinaDancer]

I've spent like $6000 trying 2 diagnose the intermittent limp mode. I've replaced so much except the actual turbocharger. After all that they tell me it's probably a wastegate issue but I don't hear any rattling or disturbing noises. I'm @ a loss. I'm out of $ now 2 even replace the turbochargers. I'm about ready 2 trade my car 4 a horse 2 ride 2 work.

[@businessman5154]

Sorry to hear this man, but you got some humor lol

[@bwilliams6515]

Great vid as always My 2009 N54 throws a 30ff code once in a while. I'm wondering if faulty fuel injectors could cause the problem. I have 135000 miles on the car and they are original to the car Thanks

[@ElRayDelRio]

P29F3 & P30FF 🤔

[@binkhalifa2004]

My car is throwing 30FF when I step on it aggressively and then get a CEL, otherwise the car drives fine when I'm gentle with it. Any ideas?

[@victorjones1995]

I’ve got the 30FF and it’s got a rough idle I can’t find anything obvious wrong with it. I had other codes but cleared them and the only one that keeps coming back is the 30FF.

[@erikmoralesrenteria2464]

Same Lol

[@metaridley77]

Hi, nice video! I have just bought one and it has 30FF, I can feel that the turbos are not boosting only when the engine is hot. Do you have any clue of what could it be? I think it's wastegate issue...

[@martinlipchev98]

Same thing on a N54 I bought last week 😃 did you figure this out?

[@Mike69KTS]

@@martinlipchev98 did you figure this out?

[@angelpena8121]

Oh wow look at us all here

[@Mike69KTS]

@@angelpena8121 yeah my shits broken. Needs turbos.

[@timothylucero8700]

Just got one last week throwing 2d2e and 30ff 😅

[@NathanKarhu]

i tuned my girlfriends 2008 335i, Boost charger pipe cupler came off, threw a code and went into limp mode "Engine malfunction reduced power" and the OBD reader says supercharger/boost surge" or something like that, fixed the cupler and the code won't go away.. Tuned with MHD stage 2 +

[@NathanKarhu]

how do i get it out of limp mode? i cleared the code but 1 still remains. do i have to use MHD to clear it?

[@SimplyCarThings]

Great in depth video! Those vacuum lines which run across the valve cover were my culprit a few months back!

[@BMWFanatic]

+Simply Car Things Oh man! Yeah pretty much the main source...and I need to do mine soon lol

[@TrueNorthStephen]

A cracked valve cover can also cause a 30ff code. So be careful if you are doing your valve cover gasket and dont over torque them!

[@BMWFanatic]

Stephen Donald Definitely will be rare for charged air to make it past the PCV and into the valve train to trigger a 30ff, but anything is possible with the N54 lol

[@mcgyverb1664]

Stephen Donald the dealership told me the valve cover should be replaced after installing a new gasket, 🤔I first thought it was only extra spending, but turns out it's true without a new valve cover replacement, that leak will show up earlier than predicted.

[@BMWFanatic]

Mcgyver B If it’s an original valve cover, then ya always good to replace the entire thing since the PCV is built into the valve cover itself. Plus it could crack later on anyways 😀

[@mcgyverb1664]

BMW Fanatic thanks for the information man, the climate season change are very tough on vehicles, I saw your new video checking for cracked cables, good video 👍the seals and gaskets are silent culprits for early leaks.

[@bg-se7rq]

doubtful..

[@kenalexander3046]

Thanks for taking the time to make this video. I appreciate your knowledge, very helpful!

[@technopro-kz4xv]

Men, i love how your engine looks, very clean! 👍i have the same car E90 but is a 320i... i like to have my engine as clean and beautiful as yours!!!! Nice video once again! 😉

[@BMWFanatic]

+technopro 2000 Thanks!!

[@aXc000]

Be informed of the following 2 issues with this video: disconnected inlets won't have any effect on correct boosting. It will simply make the turbos get air without it being filtered by the air filters. Second: Checking waste gate play on the other turbo is not possible due to their location.

[@ElRayDelRio]

I was playing with an F22 last night in my E61 and during a small pull, one of the filters came off my dual cone intakes and I threw a P30FF. Was half a cel, not full orange but the code did reduce engine power. Very odd that the code would pop up for filterless inlet.

[@ElRayDelRio]

About the left turbo, I believe if you remove the belly pan and radiator they're accessible but still going to be kind of tricky

[@bg-se7rq]

Cleannn engine bay 👌.. ur manifold tray is shining .. nice 😎😌

[@justinbuice]

No boost leak on mine ;D

[@BMWFanatic]

+Justin Buice You’ll have to drive mine next time you’re here so you can see what you’re missing 😀

[@binkhalifa2004]

Excellent troubleshooting checklist for 30FF code. Thank you!

[@Michael-ou4ph]

Just went into limp mode. 35mph, no heavy throttle. Drove home, parked for an hour, started car with ease but still idled a little rough. No engine light on dash. I popped hood and tapped gas.. After letting off, I hear a loud whoosh from turbo side of engine on deceleration. I have an 07 335i so you know I have wastegate rattle. I checked the actuator rods, seem tight right now. I've started to pull coils and plugs. I have a couple oily diverter valves but see no cracks or any sign from the charge pipe. Vac lines look good, the furry vac lines almost look like yours, but look less wear. 93k miles on the car. Do you have any idea what this issue could be?

[@turbostixxx]

Sometimes it's hard to tell on those vacuum lines, but my lines were split and dry rotted. Replaced them with new lines and no further issues. Try to take a closer look.

[@muhammadyakub7899]

Maybe boost solenoids?

[@standeman32]

@@turbostixxx where did you get new lines?

[@turbostixxx]

@@standeman32 anywhere that carries windshield washer hose lines. They work fine for vacuum lines too.

[@paulvivier1984]

Did you find the problem and what it was?

[@dominicrogers4036]

I have a 30ff code my my e92… I have installed inlets and it has came off the rear turbo… how does this cause a boost leak

[@zubairsafi5829]

God bless you, love your tons of voice. Great video, at 7 mins into the video I wish you had mentioned which turbo is bank 1 and 2. Other then that very informative.

[@fastchet3407]

Good info, good info! I like that sweatshirt. That’s classy, very well done.

[@3340edward]

I have a 05 x3 3.0 do you know anything about the limp mode on them

[@jhernandez335xi]

Ok.. I clean my engine bay on a weekly basis and it's pretty clean... but damn it. Your engine bay is soooo squeaky clean! How often do you clean it and what are you using? I barely touch a hose and my hands are black.

[@matt.108]

Also stock diverter valves can leak out boost @BMWFanatic

[@BMWFanatic]

Matthew Crosby-Krivan yep, I mentioned that 😀

[@Auto_Fanatics]

see my 335i stays on vacuum at wot it just stays under vacuum so i traced everything down to the canister so now how would i know if its a boost leak i have no codes relating to a boost leak but my car doesn't build boost just stays under vacuum any ideas

[@friguy4444]

Nice vid!

[@osamadavid9727]

Car was running fine then I installed a vrsf pipe and hks bov then next think I know car lags engine light on and 30ff 😪😓

[@javierflores1920]

Same did you find out what was causing it

[@bavarian_bimmers8508]

Hey BMW Fanatic, i got the 30FE Code on my 335i (boost to high) i have jb4, FBO ... do you know that Problem? You are the only KZbinr who makes great Videos about the N54... can you Help me please? Greetings from Bavaria:)

[@ahmedrashid4778]

I had the same issue it was the boost solenoid never had a issue since

[@habibisauce2660]

On my N54 I changed my turbos and whenever the car is cold it boost perfect. But later on as I’m driving and I try to build boost or even give it throttle it will sound a lot deeper then wouldn’t pull as hard. Then it will go into limp mode and will act the same even if I turn off the car. I’d wait for the car to cool down then if I drive again it will build boost. But later on same steps as I said before. I know it can’t be turbos because I checked wastegate hardly any rattle, checked the turbines they have no shaft play, so now I’m confused on what exactly is it. If it’s a boost solenoid or what. Please let me know!

[@muhammadyakub7899]

Nasse92 boost solenoid ?

[@ruvimvasilchuk4068]

Got a 2011 335is with a 30FF code. Scanned code and it’s popping up turbocharge-air charge is low. Is that the charge pipe?

[@paperchasin4053]

Yes it is

[@huddarudda2244]

@@paperchasin4053 same error as me, but mine is 2008 with very strong charge pipe that im told does not normally fail? could it just be the vacuum lines?

[@paperchasin4053]

Hudda Rudda 30ff means your turbos are gone

[@BW-ok4jf]

2010 535i Xdrive.... the problem i'm having is i have the 30FF w/ the engine malfunction light w/ reduced engine power light/message but i have no loss of power, drives and functions just like it should. builds boost like it should. i will clear the code and it will not come back on for a couple days. trying to find a smoke machine to test the vacuum system which i can hopefully get done this week

[@DLaVey]

Same car bro, it starts getting the 30FF very often now. Used to get drive train malfunction once in a while, but not this code. I’m FBO + inlets and outlets and stock charge pipe with atmospheric diverter valves since the charge pipe I bought didn’t fit. Think I should start with the vacuum lines first I guess.

[@HarlenPwnsAll]

Thanks so much!

[@ab273842]

Love the videos, incredibly helpful. I occasionally have the code pop up and then roughly 2 seconds later, it’s gone. The car seems to run quiet well and the code rarely comes up, so I’m really not sure what to make of the issue. I basically got the problem after installing catless downpipes and dci and turning up to map 2 on jb4. Any suggestions would be very much appreciated.

[@ab273842]

Also I changed the charge pipe and connections look solid, so I’m doubtful that is the issue

[@BMWFanatic]

James Fairbotham How do your logs look? Are you achieving the targeted boost?

[@ab273842]

Thanks for quick response! I’m just waiting for my Bimmergeeks cable so I can do bef and run some logs, so hopefully should know soon! If the hijacked fuel for boost gauge is any indicator, it looks around 15-16 psi. Have a 6 speed 335is with Canadian 94 octane , no ethanol

[@franciscoalcoba2061]

Quick question, DIY on a Alpina TCU Flash soon? Pretty pleaseeeee.

[@BMWFanatic]

+Francisco Alcoba Yeah I have it on my list!

[@DylanBB18]

I've heard you can fix any boost leak by upgrading to a motiv 900 XD

[@BMWFanatic]

Yeah really - that would be a sweet addition lol

[@christianlogansantizo1221]

I have a weird problem that I can’t seem to find a solution to my ‘08 335i. About 2 days ago I changed my VCG and everything was running smooth and perfectly fine until I noticed that there was an excessive amount of oil still dropping into the 1st spark plug. After taking apart and putting it all back together yesterday I turned the car back on to check for any more oil leaks and I noticed that the turbos didn’t even turn on. I checked the codes on my car to see if I get a 30ff and there were no codes on the car. I drove the car around to see if it would give me some type of boost but I get no power from the turbos at all. Checked all the vacuum lines, all the hoses charge pipe and everything is good. Any idea of what it could be? I’ll be uploading a video on my channel so you can see what I’m talking about. Anything helps at this point lol.

[@AngelMorales-oj3fg]

I have an 08 335xi had bad injector on #3 cylinder replaced all injectors spark plugs and coils took for test drive and ran perfectly fine till i heard a loud pop noise and lost power. Notice charge pipe came off of throttle body and now is making a main bearing type of sound. And is taking longer to start too. What can be wrong please help.

[@ThatNofbody]

I got a 30ff and a 2aaf code but it seems to idle fine drive fine I don’t hear anything noticeable and it seems to still have good power im just confused I’m assuming it’s a vacuum leak like u said I’m new to bmw so I’m rlly all just learning this stufc

[@long22312]

How do you test the boot solenoids? I think mine are bad, I am getting the 30FE code.

[@chistopherduncan3343]

Im having the same 30fe code was it your boost solenoids?

[@NathanKarhu]

why is it so hard for people to respond. :(

[@cristiancampos8983]

was it the boost solenoids?

[@NathanKarhu]

I had 30 fe and limp mode, mine was a boost solenoid@@cristiancampos8983

[@huddarudda2244]

@@NathanKarhu i have 2008 335i with this same FF30 error, do you have a source for new boost solenoids by chance?

[@luiscarlosmontanosaenz7717]

hello good video, my car was running fine but yesterday I changed the pcv valve because I saw that it smelled burnt, I decided to put a new one take advantage and I put new spark plug and bms high flow filters, and surprise when I started the car it didn't sound the same as before it accelerated and obviously less power and it sounded something like lamineo, and the bov doesn't make the typical noise pst!. With your experience, do you think that the new pcv valve that I put in is related to the problem or was it a coincidence that when I changed all this, something was damaged? I don't know what I should do :(

[@jeffreyhinman1397]

If you replace the boost solenoids replace the lines too... idk why he didn’t recommend it.

[@THEMAN03100]

I have bigger turbos and under boost I can hear louder than usual hissing under boost on the passenger side after I got my ac compressor replaced Im suspecting a loose charger pipe or somewhere near the intercooler , what do you guys think?

[@Captain-Donut]

I’ve been struggling for over a year in chasing my leak....... oh joy.

[@BMWFanatic]

Mark Jones Damn, that’s not good! Anything pointing you more towards another thing?

[@MrPanaramuh]

Mark Jones smoke test it bro.

[@manuelthodos5925]

Will replacing my charge pipe and deleting the diverters for a tial BOV help?

[@jhonnystyles]

Can you please help me with this ☹️☹️☹️ charging pressure control 30FF CODE

[@barismetin1014]

İs we charge with lime with silicon aftermarket part what should be the psi value of the hose thank you.

[@LuisGonzalez-ph8zp]

Slow instrumental sounds like logics soul food

[@cold2036]

Screw that...what did you use to clean the engine bay

[@BMWFanatic]

+cold2036 amzn.to/2AiuCEC In and out spray!

[@mikeg5172]

My car is having boost issues.. basically have no boost at all. Instead of boosting, i just get a very loud sound. Kind of sounds like a vacuum cleaner or air rushing out. If i accelerate slowly, that noise isn't there but will start once my rpm passes like 4-5k. If i go WOT from idle, that noise (vacuum cleaner/wine ) is very loud and 0 boost. My charge pipe is fine and my waste gates are fine. Any idea what it can be? I feel like something isn't connected properly.

[@nelsonperez1484]

Mike G vacuum leak. Sound should be like vacuum letting air rush out once you let off gas

[@tristanwilson8936]

My car goes into limp mode but I recently scanned it for codes and it ring throw any. And ideas? If turn the car off and back on limp mode will go away. It only happens when I’ve been driving for awhile as well

[@kaelanburke2097]

Ever get it sorted?

[@thatguyandy2573]

Can a damaged intercooler throw a 30ff??

[@jammerjamjam1]

Do you think you are going to do a DIY when you replace your vacuum lines.

[@BMWFanatic]

+jammerjamjam1 Yep! I’ll need to do them anyways soon 😀

[@Cdswjp]

Looking forward to that for sure

[@huddarudda2244]

@@BMWFanatic G'day, love your work., did you by chance end up doing a blow by blow showing us how you changed your vacuum lines across the board? i have the old 30FF issue and im told you have to lower the sub frame to get to the waste gate.. .and that sounds above my pay grade? lol

[@rickyhawkins7771]

I have a 2011 x5 35i I have a code for p312e and I dont see anything on it any where

[@dsolo3250]

I had 30ff. Fixed all vacuum hoses. No more code BUT I only max 8lbs boost on map5. No codes. Anybody have this problem. I cant find any boost leaks HELP!!!!!! Ps new turbos one year ago

[@bpcustomknives4392]

Just installed MHD stage 1 on my stock N54 yesterday and when I go WOT on the freeway the car will go into limo mode until I turn the car off and on. It never did this before the tune and it only happens on the freeway under sustained boost. Please help me!! What should I do?

[@paulvivier1984]

Did you figure the problem out?

[@bryanl7993]

Same thing happened to me. Never got the code until the next day after flashing stage 1. Wish I had just left it alone :-(

[@thee90kid]

Did you figure it out bro plz respond

[@robertmarsh4652]

So can my Boost lines and or Wastegate cause a intake VANOS code too? I keep going into limp mode with a 2008 535i and I am getting a Intake VANOS and Boost code and I have Replaced the VANOS 3 times now

[@DLaVey]

What code have the vanos?

[@norcal_kc_ross3596]

Thanks bro! I did a leak test. I hear the leak from hose from boost selonoid that go back toward passenger side by the turbo. Is that normal? Please help...

[@AntiStock505]

Sros Neng both turbos are on passenger side which turbo are you taking about. Closer to the fire wall or closer to the front of the car

[@rabbitolychee6395]

How is everyone getting 30FF codes but IM NOT I make 19-20 PSI perfectly according to MHD logs but it does not feel like it at all. I even deliberately made a boost leak and all I got was boost controller deactivation 3100 error.. No 30FF.

[@BMWFanatic]

Never have had one either, 10 years and counting

[@joellawrence5868]

If I have bov can I just block off the diverter valve line?

[@nealongreene15]

You cap the diverter ports on the two turbo intake pipes.

[@jimmybracken4869]

This just happen to me today lol. You ever install those dps?

[@BMWFanatic]

Jimmy Bracken Well shit lol Just ordered them 👍🏻

[@BMWFanatic]

Jimmy Bracken so coming soon

[@jimmybracken4869]

Lol well hey great video for educating me. I have the exact same build as you but an 07 335 with 60k miles. Im about to order vrsf dps as well! Water pump failing set me back -_- looking forward to your video.

[@BMWFanatic]

+Jimmy Bracken 👍🏻 oh man - I’m on my 3rd water pump lol

[@jimmybracken4869]

haha wow sounds fun. Waiting for my fuel pump to go next. 29DC code any idea what that may be?

[@nxtlanemotorsports5]

What is stock psi fro boost in n54 i only get up to 3 psi when hitting boost what is regular boost pressure

[@BMWFanatic]

8psi peak / around 5ish-8 when driving

[@kennyg91384]

Mine does 2.9 psi but I have MHD stage 1 don’t understand why is not boosting more. My vacuum gauge says 19 but when it goes to boost psi goes only to 2.9. I am using the torque app don’t no how good is that app

[@connorturnbull7008]

Have u changed transmission fluid?

[@BMWFanatic]

CONNOR TURNBULL not yet, Still shifts like a dream in all driving conditions

[@omarvalencia5299]

i gave my car to my gf cause of the damn 30ff 2years with the car and still havent fixed it. gave it away after only having it for 3 months haha

[@ethanhayes2363]

How’s the 335 doing these days?

[@BMWFanatic]

Doing good! New videos coming soon!

[@Noobie250r]

Would a valve cover leak cause 30ff

[@rayraycarter04]

No lol

[@nxtlanemotorsports5]

@BMW Fanatic when hitting boost how much boost do you get i only get up to 3 psi at 5rpm what do you think it could be

[@BMWFanatic]

17-18psi on 93 now with a backend flash

[@BMWFanatic]

Check the places on your car that I outlined in this video

[@nxtlanemotorsports5]

i am running 3 -4 psi on my stock 2008 bmw 535xi

[@nxtlanemotorsports5]

is that fine or no i dont have any check engine light except P0741 Bank 2 is running lean

[@BMWFanatic]

That’s not fine as you’re running lean

[@heatchamps2011]

My rear main seal is leaking or the oil pan gasket rear area . near the oil drain plug 🙃🙃🙃.

[@BMWFanatic]

heatchamps2011 that’s always tough to figure out since they can be missed diagnosed with each other

[@geo745don]

put some Bars rear main seal stopper fluid in from AutoZone. change your oil put 6qts in and and then the whole bottle of stopper fluid. it may totally fix it buy you some time, it worked for me for months then I had to put some in on my next oil change

[@heatchamps2011]

geo745don it won’t mess the engine up ?

[@geo745don]

+heatchamps2011 had no problem with it, but check out reviews on amazon Bars rear main sealer,

[@AndrewBMW]

👍

[@AndrewBMW]

👍👌

[@pasttraveller5767]

if one of dci cone is loose, would it cause 30ff code?

[@teakgeiger6792]

Me google good question! Did you ever find the answer???

[@-GA-MancsFinest]

no...,its more to do with holding or not holding pressure ,the boost solenoids do fail ,as does charge pipe,BOV is you have one and OEM Recirc valves start failing around 12psi

[@npharkes]

What a useless video... Check this, check that. Right - but how?

[@BigTurboLos]

wastegate rattle is annoying asFUCK!

[@MEZ92]

I would honestly just delete the vacuum canisters. They are literally an empty bottle that become a waste of space and a liability.

[@BMWFanatic]

MEZ92 They’re there for a purpose, so I wouldn’t delete them. The vacuum coming off the pump is not fully regulated so will fluctuate. Without a canister inline the vacuum pull on the WGs can also fluctuate. I'm sure it would work but won't be an ideal situation IMHO.

[@mitchlec8916]

Bringing you bmw DIY's... Most of your videos is you just talking and not doing the actual work.

[@accord705]

1st 😃

[@The_TURK.]

Thank you Sir

[@danstanford89]

Recently just had this problem no fault codes but my intercooler was cracked at the passenger side coupling.

[@BMWFanatic]

Dan Stanford yep, happened to be before awhile back 👎🏻

[@matt03384]

Stock fmic?

[@matt03384]

Are you in the e90post community? If so what's your user name?

[@Mattdpayme]

Pretty sure I just blew mine ...