www.tdiclub.com

Economy - Longevity - Performance
The #1 Source of TDI Information on the Web!
Forums Articles Links Meets
Orders TDI Club Cards TDIFest 2016 Gone, but not forgotten VAG-Com List Unit Conversions TDIClub Chat Thank You




Go Back   TDIClub Forums > VW TDI Discussion Areas > TDI 101

TDI 101 Got a simple/basic TDI question? Are you a newbie (new to the forums). Feel free to post your question here.

Reply
 
Thread Tools
Old November 3rd, 2013, 10:59   #1
pballer505
Newbie
 
Join Date: Sep 2012
Location: NJ
TDI(s): 01 Golf TDI
Default Turbo Overboost CEL light at high speeds only

Hey guys,

Pretty new here but have lurked around for information in the past to help solve my glow plug issues and most of my overboost issues.

2000 Golf, with 140,000 on it.

When I first got the car, I had overboost problems but it has always been a lack of power never a stalling situation but If I am behind another tdi on the parkway and we both hit the pedal the other car will out distance me quickly at any speeds.

I have cleaned the intake manifold and the egr valve but did not touch the cooler. The manifold was very very clogged up and the egr was pretty clogged as well. I looked at the turbo the veins were not clogged up and it all looked clean hopefully I can rule that one out. After I did this I seen a slight boost in power but nothing crazy though I never expected the car to push me into my seat either.

Now I will not trip my CEL light and I can hear my turbo spooling up fine but if I drive over 75 mph I will trip my CEL and when I read it, it is always the overboost code. It goes away after I turn the car off, and drive around town for a day. The turbo still sounds fine when the light is on and I dont feel any power loss but it just annoys the hell out of me that it will trip on like that.

Any ideas I read through the faq for the overboost but did not come away with a fix for my particular issue. I am not opposed to removing the egr and the cooler but for simplicity I wouldnt mind having the car functioning correctly with them because I would rather just go through regular inspection without problems because this is my high mpg commuter car more then anything else.

Thanks for all the help this is a great forum

Andrew
pballer505 is offline   Reply With Quote
Old November 3rd, 2013, 12:46   #2
Lensdude_com
Veteran Member
 
Lensdude_com's Avatar
 
Join Date: Oct 2004
Location: Edmonton, AB
Fuel Economy: 50 mpg average (Imperial)
Default

This might be symptomatic of a failing N75 valve or maladjusted turbo actuator rod. You've stated the turbo vanes looked clean but didn't mention if they moved freely so get a vacuum pump with a vacuum gauge and test the turbo actuator with the engine off. The actuator rod should start moving by 3"Hg and hit maximum travel by 18"Hg. Please report your findings to help others with this same problem
Lensdude_com is offline   Reply With Quote
Old March 29th, 2017, 13:03   #3
jagster936
Veteran Member
 
Join Date: Nov 2007
Location: Texas
Default

I have similar problem. Above 75mph I normally go limp mode with overboost code. Cycling ignition gives me my power and turbo back. I haven't been able to figure out why. It works fine all other scenarios. I'm assuming sticky vanes.
jagster936 is online now   Reply With Quote
Old March 29th, 2017, 13:43   #4
mrrhtuner
Veteran Member
 
mrrhtuner's Avatar
 
Join Date: Mar 2011
Location: London Ont Canada
Default

Quote:
Originally Posted by jagster936 View Post
I have similar problem. Above 75mph I normally go limp mode with overboost code. Cycling ignition gives me my power and turbo back. I haven't been able to figure out why. It works fine all other scenarios. I'm assuming sticky vanes.

Same here...This issue is really annoying and somewhat dangerous. I normally hit overboost on a small climb going to 100km/h and the car barely moves.
__________________
mrrhtuner is offline   Reply With Quote
Old March 29th, 2017, 13:48   #5
jagster936
Veteran Member
 
Join Date: Nov 2007
Location: Texas
Default

Haha yea I think I need new turbo but don't wanna mess with as it's fine if I just slow down
jagster936 is online now   Reply With Quote
Reply


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

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
No Power at high speeds VW Racer X TDI 101 15 March 23rd, 2007 12:26
CEL light .. no VAG .. Turbo issues Lucid VW MKIV-A4 TDIs (VE and PD) 4 July 12th, 2005 15:55
NEED HELP. Turbo cutting out at high revs/speeds Troubled TDI 101 5 December 21st, 2004 07:36
High Speeds YBZ TDI 101 28 October 21st, 2002 21:50
High Engine Speeds Crackle VW MKIV-A4 TDIs (VE and PD) 7 June 25th, 2002 12:40


All times are GMT -7. The time now is 13:20.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright - TDIClub Online LTD - 2017
Contact Us | Privacy Statement | Forum Rules | Disclaimer
TDIClub Online Ltd (TDIClub.com) is not affiliated with the VWoA or VWAG and is supported by contributions from viewers like you.
1996 - 2017, All Rights Reserved
Page generated in 0.15794 seconds with 13 queries
[Output: 69.80 Kb. compressed to 61.98 Kb. by saving 7.82 Kb. (11.20%)]