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

Order your TDIClub merchandise and help support TDIClub


Go Back   TDIClub Forums > VW TDI Discussion Areas > OBD Scanners

OBD Scanners Discussions on using On Board Diagnostic (OBD) scanners/ Diagnostic Equipment related to TDIs

Reply
 
Thread Tools
Old February 7th, 2004, 12:59   #1
Kevinski
Veteran Member
 
Join Date: Jun 2002
Location: Brighton, Michigan
Fuel Economy: 40mpg max,
Default egr mod on 2004?

Tried the egr mod on a 2004 per tdi faq instructions. It would not accept the login code of 12233. Am I doing something wrong? I have the latest version of vag-com/hex com. Thanks, Kevin
Kevinski is offline   Reply With Quote
Old February 7th, 2004, 15:30   #2
DeathEngine
Veteran Member
 
Join Date: Sep 2000
Location: ct
TDI(s): 2000 NB
Default egr mod on 2004?

From what im told, there is currently no egr mod for the 04 tdis. Not yet anyway,.
DeathEngine is offline   Reply With Quote
Old February 8th, 2004, 10:20   #3
Uwe
 
Uwe's Avatar
 
Join Date: Feb 2000
Location: Lansdale, PA, USA
Default egr mod on 2004?

That's correct. The 2004 PD engines use an EDC-16 engine management system. We think we've identified the adaptation channel which would tweak the EGR, but the standard Login won't allow changes to that channel.

Futhermore, since these cars have an Oxygen Sensor in the exhaust (to provide a feedback loop so the ECU can supply an optimal amount of EGR to keep NOx emissions to a minimum), even if EGR tweaks were possible, they would likely result in Check Engine lights and DTC's.

-Uwe-
Uwe is offline   Reply With Quote
Old February 8th, 2004, 11:07   #4
Kevinski
Veteran Member
 
Join Date: Jun 2002
Location: Brighton, Michigan
Fuel Economy: 40mpg max,
Default egr mod on 2004?

Thank you both for the response(s). Was not aware of the O2 sensor either. I wonder if this feedback system will help reduce the possibility of intake manifold clogging?

Just a side note, they do make "dummy" O2 sensors for at least my GMC pick-up. It basically tells the computor "all is well" even if no catalytic convertor is in place. I wonder if this is an option for trying to get around the problem.

BTW, the latest version of Vag-Com seems alot easier to use, nice layout, nice features, great product. Thanks again, Kevin
Kevinski is offline   Reply With Quote
Old February 8th, 2004, 13:58   #5
Uwe
 
Uwe's Avatar
 
Join Date: Feb 2000
Location: Lansdale, PA, USA
Default egr mod on 2004?

The post-CAT sensor on gassers is not a very sohpisticated sensor. Typically a "switching" sensor (as almost all 02 sensors were until a very few years ago). It's also not user for mixture feedback much (if at all). It is, as you've said, an "All is well" sensor. That means it's pretty easy to fake the signal.

My guess is that the 02 sensor used on EDC-16 engines is a wide-band sensor (meaning it gives a voltage proportinal to the oxygen content of the exhaust gasses rather than an on/off signal indicate the presence or absense of oxygen).
I don't believe that you will achieve the desired result by trying to fake this signal using a commerically available post-cat "dummy" sensor.

-Uwe-

PS: Thanks for the kind words. We strive to continually improve the product.
Uwe is offline   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


All times are GMT -7. The time now is 06:56.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2019, 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 0.12339 seconds with 11 queries
[Output: 63.15 Kb. compressed to 55.56 Kb. by saving 7.59 Kb. (12.02%)]