vacuum line fix - low boost, underboost, 30ff, wastegate rattle

flawlesskid · 07-07-2011, 08:33 PM

This post should most certainly be stickied! Thanks OP.

My leak:

prelude2perfect · 07-07-2011, 09:31 PM

Hey OP, what did you use for a pressure tester to find your leak? I need to find one I have. I'm making 15 psi pretty well but anything over that it starts to drop off target. Replaced those lines just in case since it was quick and easy to do but, no luck fixing my issue.

mattsfeir · 07-13-2011, 07:52 AM

Here are some pics of the boost leak testers I made, credit goes to Sniz and his thread with boost leak test info.

The big one went in the hot side IC connector for my AMS IC (just like Sniz). The small one will fit the stock IC.

Some improvements can be made on these by gluing a short section of pipe to each one as it's quite difficult to get the cap inside the IC connector that is the same diameter. The pipe would be slightly smaller to fit inside the cap and also fit much better inside the IC connector. Not sure how the glue would hold, a better option would be to get a threaded cap and then put in a pipe that is threaded on one end and smooth on the other, then no glue is needed. I don't know if such a thing exists though.

Atomicteal_M3 · 07-13-2011, 08:37 AM

Great info!

smellfish · 08-02-2011, 03:47 PM

Quote:

Originally Posted by flawlesskid

This post should most certainly be stickied! Thanks OP.

My leak:

+1 on the sticky! My break was essentially the same, the line split right off the connector. I was about to break down and take her to a shop until I read this. I replaced the line with some hose I had from my SR20 build 6 years ago. Back to 9.0 psi between stop lights.

Hoarding and E90Post FTW!

JunkStory · 09-27-2011, 10:58 PM

Wow, the way those hoses just snug around the oil filter housing is just asking for failure to happen. +1 on sticky

EastBayE90 · 09-27-2011, 11:55 PM

1 sticky this is very common. Rob and shiv discovered this on my car as well. Such a simple easy fix. This can help people save a lot of money.

PlutoniumTans · 09-28-2011, 12:59 AM

My shit threw both codes! OVERBOOST and UNDERBOOST lol , taking it to service on Friday

whitesmile · 09-28-2011, 01:12 AM

Quote:

Originally Posted by (-(ellblazer420

1 sticky this is very common. Rob and shiv discovered this on my car as well. Such a simple easy fix. This can help people save a lot of money.

yu, it would save a lot.

samchoi604 · 09-28-2011, 01:36 AM

By the way, anyone know what is the wire/hose directly to the left of the red arrow in the first pic? While inspecting my car for leak, I notice that particular hose is becoming brittle.

FedeM · 09-28-2011, 05:19 AM

Great job OP.
I would remember everyone that when you remove oem airbox (eg. installing new dcis/afe/else), you need to remove vacuum line (blue arrow)... Be sure to reassemble it perfectly.

PlutoniumTans · 09-28-2011, 07:33 AM

Quote:

Originally Posted by MuCcIo

Great job OP.
I would remember everyone that when you remove oem airbox (eg. installing new dcis/afe/else), you need to remove vacuum line (blue arrow)... Be sure to reassemble it perfectly.

which line are you talking about ? Thanks !

enrita · 09-28-2011, 07:43 AM

Quote:

Originally Posted by PlutoniumTans

which line are you talking about ? Thanks !

page 1

PlutoniumTans · 09-28-2011, 07:51 AM

After installing intake my car started overboosting !!!! wtf can that be ? overboosting hard body !

BMWsky · 09-28-2011, 08:54 AM

Quote:

Originally Posted by PlutoniumTans

After installing intake my car started overboosting !!!! wtf can that be ? overboosting hard body !

Which intake did you install? What parts were involved? Let's start troubleshooting.

._. · 09-28-2011, 08:54 AM

anyone have an idea other than a dealership where I can buy by the foot the same vacuum line used by BMW? I found it on realoem, but I don't want to pay the BMW tax on it. I don't want the dealership causing me grief when they see a non OEM hose on the car.

PlutoniumTans · 09-28-2011, 08:59 AM

Quote:

Originally Posted by BMWsky

Which intake did you install? What parts were involved? Let's start troubleshooting.

went from DCI back to stock air box

PlutoniumTans · 09-28-2011, 09:00 AM

Quote:

Originally Posted by r45t4m4n

anyone have an idea other than a dealership where I can buy by the foot the same vacuum line used by BMW? I found it on realoem, but I don't want to pay the BMW tax on it. I don't want the dealership causing me grief when they see a non OEM hose on the car.

Any automotive store should have vacuum line, I don't think there is any difference honestly !

._. · 09-28-2011, 09:26 AM

the OEM has a fabric around it, not just the rubber tubing.

BobS · 09-28-2011, 10:11 AM

Quote:

Originally Posted by MuCcIo

Great job OP.
I would remember everyone that when you remove oem airbox (eg. installing new dcis/afe/else), you need to remove vacuum line (blue arrow)... Be sure to reassemble it perfectly.

Can you be more specific on "reassembling it perfectly"? My car is overboosting after having IC, DCI, exhaust, downpipes and stg 2 flash installed. I'm taking it in the shop but will check this blue arrow tonight when i'm home. I had the shope install all the parts...i'm wondering if I have a leak in and around this area??? My car has 49k miles on it.

PlutoniumTans · 09-28-2011, 10:12 AM

Quote:

Originally Posted by r45t4m4n

the OEM has a fabric around it, not just the rubber tubing.

wont make any difference

PlutoniumTans · 09-28-2011, 10:17 AM

Quote:

Originally Posted by BobS

Can you be more specific on "reassembling it perfectly"? My car is overboosting after having IC, DCI, exhaust, downpipes and stg 2 flash installed. I'm taking it in the shop but will check this blue arrow tonight when i'm home. I had the shope install all the parts...i'm wondering if I have a leak in and around this area??? My car has 49k miles on it.

wow same thing bro, that blue arrow spot is really easy to put back on so I doubt that's it but i will buy couple of feet of vacuum line and try to replace more shit tomorrow

07-07-2011, 08:33 PM	#23
flawlesskid Private First Class 4 Rep 107 Posts Drives: 2007 BMW 335i Sport Package Join Date: Sep 2010 Location: Greensboro North Carolina iTrader: (0)	This post should most certainly be stickied! Thanks OP. My leak: __________________
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07-07-2011, 09:31 PM	#24
prelude2perfect Captain 60 Rep 621 Posts Drives: 2013 M5 and 2015 535i Join Date: Apr 2010 Location: Savannah, GA iTrader: (8)	Hey OP, what did you use for a pressure tester to find your leak? I need to find one I have. I'm making 15 psi pretty well but anything over that it starts to drop off target. Replaced those lines just in case since it was quick and easy to do but, no luck fixing my issue.
	Appreciate 0 Quote

07-13-2011, 07:52 AM	#25
mattsfeir Lieutenant 37 Rep 458 Posts Drives: 335xi Join Date: Oct 2009 Location: CO iTrader: (2)	Here are some pics of the boost leak testers I made, credit goes to Sniz and his thread with boost leak test info. The big one went in the hot side IC connector for my AMS IC (just like Sniz). The small one will fit the stock IC. Some improvements can be made on these by gluing a short section of pipe to each one as it's quite difficult to get the cap inside the IC connector that is the same diameter. The pipe would be slightly smaller to fit inside the cap and also fit much better inside the IC connector. Not sure how the glue would hold, a better option would be to get a threaded cap and then put in a pipe that is threaded on one end and smooth on the other, then no glue is needed. I don't know if such a thing exists though.
	Appreciate 0 Quote

07-13-2011, 08:37 AM	#26
Atomicteal_M3 Brigadier General 745 Rep 4,427 Posts Drives: E90 M3 AW Join Date: Aug 2010 Location: FT. Bragg, NC. iTrader: (28) Garage List 2007 335i [9.00]	Great info! __________________ ModeCarbon V1 CF lip/PF AG CF SS ext./ARKYM CF Diffuser/OSS AE's/B&G Springs/CF Performance Spoiler/V2 Led Performance SW/Meisterschaft GT exhaust
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09-27-2011, 10:58 PM	#28
JunkStory Major 160 Rep 1,307 Posts Drives: E92 M3, 8V RS3 Join Date: May 2008 Location: 98230 iTrader: (3)	Wow, the way those hoses just snug around the oil filter housing is just asking for failure to happen. +1 on sticky
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09-27-2011, 11:55 PM	#29
EastBayE90 Formerly (-(ellblazer420 48 Rep 703 Posts Drives: 07 E90 335i M/T, 15 F80 M3 DCT Join Date: Sep 2010 Location: SF East Bay, CA iTrader: (0) Garage List 2007 BMW 335I E90 [8.84]	1 sticky this is very common. Rob and shiv discovered this on my car as well. Such a simple easy fix. This can help people save a lot of money. __________________ (410whp 445ft/lbs \| DCI + Meth Only) OpenFlash OTS Stage 1 Flash \| Vishnu PWM Meth Kit \| Vishnu DCI\| Forge DVs
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09-28-2011, 12:59 AM	#30
PlutoniumTans Lieutenant 22 Rep 575 Posts Drives: 335i Join Date: Jul 2011 Location: Brooklyn,NY iTrader: (2)	My shit threw both codes! OVERBOOST and UNDERBOOST lol , taking it to service on Friday
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09-28-2011, 01:36 AM	#32
samchoi604 Colonel 60 Rep 2,334 Posts Drives: black on black Join Date: Mar 2009 Location: Burnaby, BC iTrader: (3)	By the way, anyone know what is the wire/hose directly to the left of the red arrow in the first pic? While inspecting my car for leak, I notice that particular hose is becoming brittle.
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09-28-2011, 05:19 AM	#33
FedeM Made in Italy 31 Rep 287 Posts Drives: Former 135i Join Date: Nov 2010 Location: ZH, Switzerland iTrader: (0) Garage List 2007 BMW 135i [7.40]	Great job OP. I would remember everyone that when you remove oem airbox (eg. installing new dcis/afe/else), you need to remove vacuum line (blue arrow)... Be sure to reassemble it perfectly.
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09-28-2011, 07:51 AM	#36
PlutoniumTans Lieutenant 22 Rep 575 Posts Drives: 335i Join Date: Jul 2011 Location: Brooklyn,NY iTrader: (2)	After installing intake my car started overboosting !!!! wtf can that be ? overboosting hard body !
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09-28-2011, 08:54 AM	#38
._. Colonel 74 Rep 2,353 Posts Drives: BMW Join Date: Jun 2009 Location: Miami iTrader: (15)	anyone have an idea other than a dealership where I can buy by the foot the same vacuum line used by BMW? I found it on realoem, but I don't want to pay the BMW tax on it. I don't want the dealership causing me grief when they see a non OEM hose on the car.
	Appreciate 0 Quote

09-28-2011, 09:26 AM	#41
._. Colonel 74 Rep 2,353 Posts Drives: BMW Join Date: Jun 2009 Location: Miami iTrader: (15)	the OEM has a fabric around it, not just the rubber tubing.
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