[Paliator]

Hello everyone.
I recently purchased a 2010 BMW N54 335i 6MT with 63K miles. After a few hundred miles of driving I got a 30ff and I just put the vacuum lines on the canister on tighter and it went away for a while. Then on my way to work at least 3x a week around the same turn I get a 30ff. Last weekend I deleted my vacuum canister and got 3mm silicone vacuum lines straight from the right of the engine cover to the left to the boost solenoids. Went around the turn yesterday and it went away! Or so I thought until today when low and behold right around that haunted turn I get 30ff. I do hear a loud "whooshing" sound when I'm building boost but I still hit 9.1 pounds according to my carly scanner at 5350 RPM. I am all stock besides m sport muffler and a triple core CSF aluminum radiator and vacuum canister delete. Are my wastegates bad even though I hit the right boost? Do I have a leak somewhere else? One thing I can say is the turn is right after a big uphill to a higher elevation (+900 feet from my house). Any help would be greatly appreciated.

[Silent9n54]

did you try replacing your boost solenoids ?? so far i fixed 3 30ff codes with just replacing the solenoids

if you can log that would tell you how your turbos are doing

[mweisdorfer]

Originally Posted by Paliator

Hello everyone.
I recently purchased a 2010 BMW N54 335i 6MT with 63K miles. After a few hundred miles of driving I got a 30ff and I just put the vacuum lines on the canister on tighter and it went away for a while. Then on my way to work at least 3x a week around the same turn I get a 30ff. Last weekend I deleted my vacuum canister and got 3mm silicone vacuum lines straight from the right of the engine cover to the left to the boost solenoids. Went around the turn yesterday and it went away! Or so I thought until today when low and behold right around that haunted turn I get 30ff. I do hear a loud "whooshing" sound when I'm building boost but I still hit 9.1 pounds according to my carly scanner at 5350 RPM. I am all stock besides m sport muffler and a triple core CSF aluminum radiator and vacuum canister delete. Are my wastegates bad even though I hit the right boost? Do I have a leak somewhere else? One thing I can say is the turn is right after a big uphill to a higher elevation (+900 feet from my house). Any help would be greatly appreciated.

Do a smoke test

[Paliator]

UPDATE! I found the leak!! After changing my very vacuum line and 2 boost solenoids, my passenger side intercooler connection was the "loose end" quite literally. I am overjoyed with this. My car does not make as cool turbo noises now however hahah. I am currently hitting 13.9 PSI absolute max on MHD stage one. Is this normal?

[torrque]

I am also getting this but only when very hot outside, and I wasn't pushing the car too hard either.... must check.

[torrque]

Originally Posted by Silent11N54

did you try replacing your boost solenoids ?? so far i fixed 3 30ff codes with just replacing the solenoids

if you can log that would tell you how your turbos are doing

Hi,
Is that a common occurrence, boost solenoids to be the fault?

Mine is at over 125k miles, and I do get the code only when really hot outside...It's like something overheats really bad and/or map sensors don't pickup pressure due to heat.
I do have an Helix intercooler, and it's pretty big, so it's not that.
I have no leaks, but still need to do a smoke test.
I am on original solenoids.

Thanks

[Silent9n54]

Originally Posted by torrque

Hi,
Is that a common occurrence, boost solenoids to be the fault?

Mine is at over 125k miles, and I do get the code only when really hot outside...It's like something overheats really bad and/or map sensors don't pickup pressure due to heat.
I do have an Helix intercooler, and it's pretty big, so it's not that.
I have no leaks, but still need to do a smoke test.
I am on original solenoids.

Thanks

it is a common occurence and they are not too expensive either and easy to diy

2007 E92 335i / VRSF 5" FMIC-Charge Pipe-DCI-Inlets/ TurboSmart Plumb Back DV / XHP / E50 Custom Tune by WedgePerformance / APEX ARC8 / MT ET Street / 11.5 @ 119 / Instagram @silent11n54

[torrque]

The thing is; it cooled down now a bit (mid 70's as opposed to high 90's when it happened), I reset the code and it never came back. Car is boosting like crazy, I mean it pulls really well (haven't pulled a log, don't have the license anymore for MHD).
Solenoids could get bad when overheated, so I'm not discounting them... Might just buy a set.
If I had a boost leak, it would do it all the time, cold or hot (just thinking)?

[=C=]

Replace boost solenoids and vacuum lines fixed my 30FF.

Just FYI OP.