Boost leak?

Chitown335i · 06-28-2015, 09:52 PM

For those who have had boost leaks. I need suggestions. No codes..mm car runs fine except no boost. Intercooler connections seem fine. Chsrgepipe is fine. What else could be causing me to have no boost. My vaccum lines are good...I have a boost gauge in my vent and registers vaccum fine...I'm at a loss. It was like cruising on the highway. And went to accelerate and no boost

335NJ · 06-28-2015, 10:24 PM

Check all of your vacuum lines, and actually pressure test them (see the N54Tech DIY). Then test the boost solenoids.

Are you using a tune of any kind?

Chitown335i · 06-28-2015, 10:29 PM

BB e85. For abkut 3 months.....boost solenoids?

924er · 06-28-2015, 10:51 PM

Boost solenoids

Chitown335i · 06-28-2015, 11:07 PM

But I'm not even getting one psi of boost....would the solenoids really be a possibility?

Spacecpe · 06-29-2015, 12:47 PM

If your not getting 1 psi out, then it should be pretty damn easy to hear the air leak out.. Did you check the 2 vacuum lines going over the OFH ? while the car is running, pull one vacuum line at a time from the canister and see if you can hear a change in the exhaust tone. report back.

mike@x-ph.com · 06-29-2015, 01:52 PM

Quote:

Originally Posted by Chitown335i

For those who have had boost leaks. I need suggestions. No codes..mm car runs fine except no boost. Intercooler connections seem fine. Chsrgepipe is fine. What else could be causing me to have no boost. My vaccum lines are good...I have a boost gauge in my vent and registers vaccum fine...I'm at a loss. It was like cruising on the highway. And went to accelerate and no boost

If you are not getting any boost the car will throw a code.

Chitown335i · 06-29-2015, 03:19 PM

Weird....no codes at all. WOT....but no boost map 2 on jb4....I posted a log in N54.....same thread title......vac lines are still connected at OFH .....my vac is reading normal on the gauge...

335NJ · 06-29-2015, 07:10 PM

Quote:

Originally Posted by Chitown335i

Weird....no codes at all. WOT....but no boost map 2 on jb4....I posted a log in N54.....same thread title......vac lines are still connected at OFH .....my vac is reading normal on the gauge...

Post the log on datazap, then post the link here.

Chitown335i · 06-29-2015, 07:53 PM

Quote:

Originally Posted by 335NJ

Post the log on datazap, then post the link here.

Not sure how to post a csv file from jb4 to a datazap... here is the link to my thread on n54...

http://www.n54tech.com/forums/showthread.php?t=31712

335NJ · 06-29-2015, 08:50 PM

Quote:

Originally Posted by Chitown335i

Not sure how to post a csv file from jb4 to a datazap... here is the link to my thread on n54...

http://www.n54tech.com/forums/showthread.php?t=31712

What firmware on the JB4 are you using?

Chitown335i · 06-29-2015, 09:01 PM

Quote:

Originally Posted by 335NJ

What firmware on the JB4 are you using?

V29....but Terry just posted yesterday the new v30...but I doubt that is the reason for the boost leak....but I'm downloading new firmware tonight anyway

335NJ · 06-29-2015, 09:07 PM

Quote:

Originally Posted by Chitown335i

V29....but Terry just posted yesterday the new v30...but I doubt that is the reason for the boost leak....but I'm downloading new firmware tonight anyway

And your interface has all of the appropriate values correct? You're using the BB Backend, so make sure the steering wheel controls are set to 4/2 & all AFR BIAS + DUTY BIAS values are 0.

Also make sure you have gear 1-2-3 boost set to 0.0 to disable any JB4 control lowering those specific gears targets.

Chitown335i · 06-29-2015, 09:10 PM

Quote:

Originally Posted by 335NJ

And your interface has all of the appropriate values correct? You're using the BB Backend, so make sure the steering wheel controls are set to 4/2 & all AFR BIAS + DUTY BIAS values are 0.

Also make sure you have gear 1-2-3 boost set to 0.0 to disable any JB4 control lowering those specific gears targets.

Correct....AL values are as stated. I was boosting just fine on map 2 and then 10 minutes later no boost at all.

335NJ · 06-29-2015, 09:13 PM

Quote:

Originally Posted by Chitown335i

Correct....AL values are as stated. I was boosting just fine on map 2 and then 10 minutes later no boost at all.

Is the wastegate(s) stuck open? Somethings odd, because if you truly had a boost leak, there should be a 30FF (at least). Did your exhaust get much louder since the issue started?

Hopefully the guys at N54Tech can find an answer in the logs.

06-28-2015, 09:52 PM	#1
Chitown335i Private First Class 28 Rep 182 Posts Drives: 2007 Smoky Graphite 335i Join Date: May 2014 Location: Joliet, IL iTrader: (0)	Boost leak? For those who have had boost leaks. I need suggestions. No codes..mm car runs fine except no boost. Intercooler connections seem fine. Chsrgepipe is fine. What else could be causing me to have no boost. My vaccum lines are good...I have a boost gauge in my vent and registers vaccum fine...I'm at a loss. It was like cruising on the highway. And went to accelerate and no boost __________________ 07 335i...M2 exhaust...Macht Schnell DP's...VRSF 7" FMIC...MMP inlets....VRSF Chargpipe with HKS BOV....MHD w/WedgeTuning.... RB Stealths!!!....MFactory LSD...Stage 2 Fuel It...N20 map sensor....265/40/18 Sticky Mickeys in the rear
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06-28-2015, 10:24 PM	#2
335NJ Colonel 533 Rep 2,872 Posts Drives: 2008 335i 6MT E90 Join Date: Feb 2014 Location: NJ/Philadelphia Suburbs iTrader: (1)	Check all of your vacuum lines, and actually pressure test them (see the N54Tech DIY). Then test the boost solenoids. Are you using a tune of any kind?
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06-28-2015, 10:29 PM	#3
Chitown335i Private First Class 28 Rep 182 Posts Drives: 2007 Smoky Graphite 335i Join Date: May 2014 Location: Joliet, IL iTrader: (0)	BB e85. For abkut 3 months.....boost solenoids?
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06-28-2015, 10:51 PM	#4
924er Colonel 352 Rep 2,050 Posts Drives: e92 335i '10 Join Date: Feb 2014 Location: Socal iTrader: (0)	Boost solenoids __________________ '10 e92 N54 DCI intakes, ER chargepipe, TIAL BOV, VRSF 5in FMIC, BMS Downpipes COBB e30
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06-28-2015, 11:07 PM	#5
Chitown335i Private First Class 28 Rep 182 Posts Drives: 2007 Smoky Graphite 335i Join Date: May 2014 Location: Joliet, IL iTrader: (0)	But I'm not even getting one psi of boost....would the solenoids really be a possibility?
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06-29-2015, 12:47 PM	#6
Spacecpe First Lieutenant 44 Rep 359 Posts Drives: E90 335i Msport Join Date: Sep 2014 Location: Winnipeg, Mb Canada iTrader: (0)	If your not getting 1 psi out, then it should be pretty damn easy to hear the air leak out.. Did you check the 2 vacuum lines going over the OFH ? while the car is running, pull one vacuum line at a time from the canister and see if you can hear a change in the exhaust tone. report back.
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06-29-2015, 03:19 PM	#8
Chitown335i Private First Class 28 Rep 182 Posts Drives: 2007 Smoky Graphite 335i Join Date: May 2014 Location: Joliet, IL iTrader: (0)	Weird....no codes at all. WOT....but no boost map 2 on jb4....I posted a log in N54.....same thread title......vac lines are still connected at OFH .....my vac is reading normal on the gauge...
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