E90Post
 


Extreme Powerhouse
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Sticky wastegates?



Reply
 
Thread Tools Search this Thread
      02-13-2016, 10:27 PM   #1
sirdaft1
Brigadier General
sirdaft1's Avatar
United_States
2203
Rep
3,336
Posts

Drives: X5 & E90 WTCC Widebody Racecar
Join Date: Feb 2013
Location: Chicago West Burbs

iTrader: (9)

Garage List
Sticky wastegates?

I'll mention that I've suspected that my turbos may have sticky wastegates in the past (irregular boost, then manually moved WG's, viola they worked). Tonight was a very similar story. On the expressway, boost would hit normal. Next hit, it would lag lag lag then hit hard out of nowhere. Next hit, max boost would be 7psi (target was 15psi). Logs look normal.

Every single time it wouldn't hit target, if I tapped the throttle a few times before going WOT, it would hit boost target just fine. Has anyone else experienced these issues?

Wondering if new turbos are on the horizon shortly
Appreciate 0
      02-13-2016, 11:24 PM   #2
Jonah335
Private First Class
54
Rep
115
Posts

Drives: 335i
Join Date: Apr 2015
Location: Florida

iTrader: (2)

Feel like I'm in the same boat but haven't had a chance to look into it. I'll report back when I find out more
Appreciate 0
      02-14-2016, 12:04 PM   #3
Jklad
Lieutenant Colonel
Jklad's Avatar
United_States
421
Rep
1,643
Posts

Drives: 2007 335i Coupe
Join Date: Nov 2010
Location: Palatine, IL

iTrader: (0)

What tune you running these days??
__________________
2007 E92 335i MT
Appreciate 0
      02-14-2016, 12:59 PM   #4
sirdaft1
Brigadier General
sirdaft1's Avatar
United_States
2203
Rep
3,336
Posts

Drives: X5 & E90 WTCC Widebody Racecar
Join Date: Feb 2013
Location: Chicago West Burbs

iTrader: (9)

Garage List
Quote:
Originally Posted by Jklad View Post
What tune you running these days??
JB4 + BB pump flash. Considering MHD but was thinking I'll hold off until new turbos for a custom MHD tune. You?
Appreciate 0
      02-14-2016, 01:08 PM   #5
tc535i
Lieutenant Colonel
215
Rep
1,818
Posts

Drives: 2007 335i, 2001 330i, 1995 M3
Join Date: Sep 2013
Location: West Los Angeles

iTrader: (1)

Ever check your diverter valves?
Appreciate 0
      02-14-2016, 01:41 PM   #6
Glennyd
Second Lieutenant
65
Rep
246
Posts

Drives: 2008 335
Join Date: Aug 2013
Location: CT

iTrader: (2)

Diverted valves

How would I check the diverted valves and what else could be checked and how? Obviously I'm having the same issue. Lol
Appreciate 0
      02-14-2016, 01:44 PM   #7
sirdaft1
Brigadier General
sirdaft1's Avatar
United_States
2203
Rep
3,336
Posts

Drives: X5 & E90 WTCC Widebody Racecar
Join Date: Feb 2013
Location: Chicago West Burbs

iTrader: (9)

Garage List
Quote:
Originally Posted by tc535i View Post
Ever check your diverter valves?
Si. I run Forge DV's so I've cleaned them out/lubed them up. Not likely the issue unfortunately.
Appreciate 0
      02-14-2016, 01:46 PM   #8
tc535i
Lieutenant Colonel
215
Rep
1,818
Posts

Drives: 2007 335i, 2001 330i, 1995 M3
Join Date: Sep 2013
Location: West Los Angeles

iTrader: (1)

Boost solenoids? Might be time for a vacuum test
Appreciate 0
      02-14-2016, 02:09 PM   #9
Jonah335
Private First Class
54
Rep
115
Posts

Drives: 335i
Join Date: Apr 2015
Location: Florida

iTrader: (2)

I Got new boost solenoids when it first happened. For a pull the spool improved but it went back to what was described in the first post
Appreciate 0
Reply

Bookmarks


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



All times are GMT -5. The time now is 03:02 PM.




e90post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST