[e90_Daniel17]

Can someone help me with my boost leak, get 30FF when car is usually warm and happens when moderately accelerating. Changed all vaccuum lines and charge pipe already. Just running Jb4 and bms dci. Jb4 logs also show that im overboosting.

[rockasmirkbangkong]

Did you check your boost solenoid. It will make a humming sound if its going out.

[feuer]

30ff and overboosting? Probably you mean underboosting. Probably you need turbos but start with the simple and cheap stuff: vacuum lines, o-rings on intercooler and charge pipe, solenoids, and adjusting wastegates on turbos.

[F30lolz]

Does anyone get 30FF during WOT but doesn't experience any stumbles/hesitations? Every now and then in WOT I get 30FF but car doesn't skip a beat. In 20K miles/June 2017 the turbo warranty expires for me so I'll have to get it looked at beforehand.

Edit: I've had the wastegate rattle ever since I got the car in May with 55K (currently at 62K).

[ucdbiendog]

there is a good 30ff DIY thread in the DIY section. also might have better insight in the N54 forum.

[e90_Daniel17]

Originally Posted by feuer

30ff and overboosting? Probably you mean underboosting. Probably you need turbos but start with the simple and cheap stuff: vacuum lines, o-rings on intercooler and charge pipe, solenoids, and adjusting wastegates on turbos.

Orignially getting 30FF code, but when checking my jb4 logs it shows that im overboosting. Already replaced all vaccumm lines and chargepipe.

[feuer]

Originally Posted by e90_Daniel17

Orignially getting 30FF code, but when checking my jb4 logs it shows that im overboosting. Already replaced all vaccumm lines and chargepipe.

I don't know what other mods you have but if possible remove jb4 and proceed with test.