N54Tech.com - International Turbo Racing Discussion
(#1)
Old
BBECK001 BBECK001 is offline
New Member
 
Posts: 4
Join Date: May 2019
Car: 2010 535xi
Default Low boost log review - 05-26-2019, 03:43 PM

Having trouble meeting boost target, receiving 30ff. Car runs great other than low boost. I'm here with a log to see if i'm going in the right direction...
2010 535xi AT with 150,000 miles.



Here is what I've done so far.

1. New intercooler, couplers, clamps, charge pipe with Tial BOV, new manifold gaskets, TB gasket.
2. Leak test from charge pipe.
3. New vac lines.
4. New boost solenoids.
5. Boost solenoid operational check.
6. Applied vacuum using syringe to wastegates, seen/heard movement.
7. Removed JB4 still get low boost/engine light.

Does the wastegate typically rattle on deceleration? I hear something but very faint. Don't hear any rattle when revving with the hood up.
Attached Images
 
Attached Files
File Type: csv 1st.csv (9.3 KB, 4 views)
File Type: csv 2nd.csv (8.6 KB, 6 views)

Last edited by BBECK001; 05-26-2019 at 03:48 PM..
Reply With Quote
(#2)
Old
Haynpunch's Avatar
Haynpunch Haynpunch is offline
Junior Member
 
Posts: 492
Join Date: Jun 2017
Car: 07 E90 335i
Default 05-26-2019, 11:02 PM

Have you tried this?

N54 WG Vacuum Line Testing HOW-TO - YouTube


07 E90 AT - xHP
JB4 G5 - Trebila BEF
FBO
Hybrids
Reply With Quote
(#3)
Old
BBECK001 BBECK001 is offline
New Member
 
Posts: 4
Join Date: May 2019
Car: 2010 535xi
Default 05-27-2019, 05:21 AM

Quote:
Originally Posted by Haynpunch
Yes, it operates correctly.

I'm going to disconnect the exhaust to see if I have a clog.
Reply With Quote
(#4)
Old
Dave @ BMS/Fuel-It!'s Avatar
Dave @ BMS/Fuel-It! Dave @ BMS/Fuel-It! is offline
Super Moderator
 
Posts: 4,439
Join Date: Apr 2014
Car: E92 335XI
Default 05-27-2019, 08:47 AM

WG aren't supposed to rattle on decel- that's a sign of worn/tired WG

At your mileage- i wouldnt rule out just tired oem turbos (assuming they haven't been replaced)



http://www.fuel-it.biz/

e92 AT 335xi 2.0
Doc Race Kit 6062
Fuel-It!Platinum DIY PI Kit + Stage 2BL
Reply With Quote
(#5)
Old
BBECK001 BBECK001 is offline
New Member
 
Posts: 4
Join Date: May 2019
Car: 2010 535xi
Default 05-27-2019, 01:24 PM

Quote:
Originally Posted by Dave @ BMS/Fuel-It!
WG aren't supposed to rattle on decel- that's a sign of worn/tired WG

At your mileage- i wouldnt rule out just tired oem turbos (assuming they haven't been replaced)
Would that be checked by shaft play? The front turbo is tight. Not burning any oil.

Dropped the *** back exhaust, no change.
Reply With Quote
(#6)
Old
Dave @ BMS/Fuel-It!'s Avatar
Dave @ BMS/Fuel-It! Dave @ BMS/Fuel-It! is offline
Super Moderator
 
Posts: 4,439
Join Date: Apr 2014
Car: E92 335XI
Default 05-27-2019, 08:37 PM

Quote:
Originally Posted by BBECK001
Would that be checked by shaft play? The front turbo is tight. Not burning any oil.

Dropped the *** back exhaust, no change.
shaft play, rattle, tbh again at your mileage it may just be worn hardware, 150k is a lot, especially now that you are turning up the boost.



http://www.fuel-it.biz/

e92 AT 335xi 2.0
Doc Race Kit 6062
Fuel-It!Platinum DIY PI Kit + Stage 2BL
Reply With Quote
(#7)
Old
BBECK001 BBECK001 is offline
New Member
 
Posts: 4
Join Date: May 2019
Car: 2010 535xi
Default 06-03-2019, 07:37 PM

Wow, what a job! Getting that sub frame out was tough. Worried about getting the passenger motor mount reinstalled. I'd say they are worn out.
Attached Images
 
Reply With Quote
(#8)
Old
Dave @ BMS/Fuel-It!'s Avatar
Dave @ BMS/Fuel-It! Dave @ BMS/Fuel-It! is offline
Super Moderator
 
Posts: 4,439
Join Date: Apr 2014
Car: E92 335XI
Default 06-04-2019, 12:45 PM

#n54life only the strong survive, and dont cry at night.



http://www.fuel-it.biz/

e92 AT 335xi 2.0
Doc Race Kit 6062
Fuel-It!Platinum DIY PI Kit + Stage 2BL
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump




vBulletin Skin developed by: vBStyles.com
Copyright 2007 - 2018, N54tech.com