Car won't boost over 5 PSI and sounds like I have a EWG

psmitty95 · 06-26-2014, 03:43 PM

Ok so today i'm driving around and everything is fine then I go to accelerate and notice the gas gauge is stuck at 1/4 mile and there is an extremely loud sound like the car is a STi with external waste gate. It basically just sounds like loud air being released anytime I go WOT now. I already took off the covers and checked the obvious charge pipe and fmic connections along with the vac line going from my BOV to manifold and haven't seen anything... Anyone have any ideas? Log and video below

http://datazap.me/u/psmith95/boost-probs

135Pats · 06-26-2014, 03:47 PM

Gotta be a boost leak...Codes?

The gas gauge thing I'd think is unrelated. The fuel float can get stuck on something, or can just become defective. Mine gets screwy at 1/4 tank as well, i've inspected and it's not getting stuck. So only thing I can think of is that the sensor has gone bad...that still doesn't answer why it works fine and dandy until 1/4 tank.

N54 problems dude....

Ingeniator · 06-26-2014, 04:08 PM

Did the lower charge pipe crack/come off if you don't have the metal one? It is odd that your map sensor picks up ~5psi and then goes back down when your off throttle. This is where it would be nice to have a vac gauge to see if it is an after throttlebody issue. Best of luck.

psmitty95 · 06-26-2014, 04:20 PM

Quote:

Originally Posted by 135Pats

Gotta be a boost leak...Codes?

The gas gauge thing I'd think is unrelated. The fuel float can get stuck on something, or can just become defective. Mine gets screwy at 1/4 tank as well, i've inspected and it's not getting stuck. So only thing I can think of is that the sensor has gone bad...that still doesn't answer why it works fine and dandy until 1/4 tank.

N54 problems dude....

I have my fuel gauge set up as a boost gauge so its nothing fuel related. Really weird it just happened all of a sudden but it is really hot out today so maybe that did something?

psmitty95 · 06-26-2014, 04:21 PM

Quote:

Originally Posted by Ingeniator

Did the lower charge pipe crack/come off if you don't have the metal one? It is odd that your map sensor picks up ~5psi and then goes back down when your off throttle. This is where it would be nice to have a vac gauge to see if it is an after throttlebody issue. Best of luck.

I peaked at lower charge pipe and it looked secure to me but maybe it cracked. I'll try and have a better look at it tomorrow i guess

135Pats · 06-26-2014, 04:22 PM

IDK...5 pounds is an odd place to have it at.

One time my lower CP blew off at the front mount outlet, the car wouldn't build more than like .5 pounds...so if it's a boost leak it's somewhere between very minor, and significant. Which of course makes it a PITA to track down.

Is it throwing 30FF codes?

cstmx_ryder · 06-26-2014, 04:25 PM

OEM DVs, or silicone elbow might have a hole on the under side from rubbing against some metal lines. Happened to me once on the CP to FMIC silicone connection on the cold side....

psmitty95 · 06-27-2014, 09:36 PM

Well I found it. This morning I went out to double check everything and noticed a bit of oil down on the lower charge pipe connection. Tore everything a part and I guess the lower charge pipe popped off just enough to leak. Everything seems to be running fine now

924er · 06-27-2014, 10:33 PM

thats what my car sounded like when i had a boost leak

06-26-2014, 03:43 PM	#1
psmitty95 Brigadier General 578 Rep 4,393 Posts Drives: '23 M340i xDrive Join Date: Jan 2012 Location: Boston, MA iTrader: (11)	Car won't boost over 5 PSI and sounds like I have a EWG Ok so today i'm driving around and everything is fine then I go to accelerate and notice the gas gauge is stuck at 1/4 mile and there is an extremely loud sound like the car is a STi with external waste gate. It basically just sounds like loud air being released anytime I go WOT now. I already took off the covers and checked the obvious charge pipe and fmic connections along with the vac line going from my BOV to manifold and haven't seen anything... Anyone have any ideas? Log and video below http://datazap.me/u/psmith95/boost-probs __________________ < Click picture for photoshoot E90 335i xDrive 6spd, Nav, Prem, Cold Weather, & Sports package - Msport Conversion Mods: JB4 + MHD, Doc Race ST, Pure 6266, AD-Eng PI/Mounts, Fuel-It st. 3, Custom Exhaust, Tuned by TwistedTuning More Pictures: Build Thread /// 683AWHP/675AWTQ
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06-26-2014, 03:47 PM	#2
135Pats Major General 456 Rep 6,478 Posts Drives: A few BMWs Join Date: May 2012 Location: Maryland iTrader: (3)	Gotta be a boost leak...Codes? The gas gauge thing I'd think is unrelated. The fuel float can get stuck on something, or can just become defective. Mine gets screwy at 1/4 tank as well, i've inspected and it's not getting stuck. So only thing I can think of is that the sensor has gone bad...that still doesn't answer why it works fine and dandy until 1/4 tank. N54 problems dude.... __________________ E88 N54 Alpinweiss/Coral Red/Motiv HTA 3586r Tial .82AR/Other stuff...652WHP F30 N55 XDrive EBII
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06-26-2014, 04:08 PM	#3
Ingeniator Major 34 Rep 1,093 Posts Drives: 07 335XI(90) 09 135I(82) Join Date: Nov 2013 Location: Fort Mac, Alberta iTrader: (1)	Did the lower charge pipe crack/come off if you don't have the metal one? It is odd that your map sensor picks up ~5psi and then goes back down when your off throttle. This is where it would be nice to have a vac gauge to see if it is an after throttlebody issue. Best of luck. __________________ 07 335XI (A008006) 6AT ~94K miles JB4 G5 ISO VSRF DP's 09 135I M (VK80379) 6MT. Race Project car. 1) Install Cobb/piggyback? and Motiv 600 Kit[HTA3076R w/ tial .82] 2) JRZ or Moton suspension. 3) Build high flow intake manifold with multi-port fuel and relocate OFH 4) Build full cage 5) Complete staged twin setup with HTA4205R [w/Tial 1.16] 6) Complete dry sump system
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06-26-2014, 04:22 PM	#6
135Pats Major General 456 Rep 6,478 Posts Drives: A few BMWs Join Date: May 2012 Location: Maryland iTrader: (3)	IDK...5 pounds is an odd place to have it at. One time my lower CP blew off at the front mount outlet, the car wouldn't build more than like .5 pounds...so if it's a boost leak it's somewhere between very minor, and significant. Which of course makes it a PITA to track down. Is it throwing 30FF codes? __________________ E88 N54 Alpinweiss/Coral Red/Motiv HTA 3586r Tial .82AR/Other stuff...652WHP F30 N55 XDrive EBII
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06-26-2014, 04:25 PM	#7
cstmx_ryder Colonel 164 Rep 2,875 Posts Drives: A metal box with a roundel Join Date: Jul 2007 Location: Portland, OR iTrader: (2)	OEM DVs, or silicone elbow might have a hole on the under side from rubbing against some metal lines. Happened to me once on the CP to FMIC silicone connection on the cold side.... __________________ '08 AW E90 335i PROcede V5 \| BMS DCI \| RR DPs \| ETS FMIC \| FORGE DVs \| Stett CP \| Vanguard \| PSS10
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06-27-2014, 09:36 PM	#8
psmitty95 Brigadier General 578 Rep 4,393 Posts Drives: '23 M340i xDrive Join Date: Jan 2012 Location: Boston, MA iTrader: (11)	Well I found it. This morning I went out to double check everything and noticed a bit of oil down on the lower charge pipe connection. Tore everything a part and I guess the lower charge pipe popped off just enough to leak. Everything seems to be running fine now __________________ < Click picture for photoshoot E90 335i xDrive 6spd, Nav, Prem, Cold Weather, & Sports package - Msport Conversion Mods: JB4 + MHD, Doc Race ST, Pure 6266, AD-Eng PI/Mounts, Fuel-It st. 3, Custom Exhaust, Tuned by TwistedTuning More Pictures: Build Thread /// 683AWHP/675AWTQ
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06-27-2014, 10:33 PM	#9
924er Colonel 352 Rep 2,050 Posts Drives: e92 335i '10 Join Date: Feb 2014 Location: Socal iTrader: (0)	thats what my car sounded like when i had a boost leak
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