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 > TDI (Diesel) Emissions

TDI (Diesel) Emissions This is a discussion about emissions from TDI's. Pro's cons of Diesels (including biodiesel) effects on the environment and how they compare to Gasoline and other fuel sources for Internal combustion engines.

Reply
 
Thread Tools
Old June 4th, 2016, 04:48   #1
pushgears
Veteran Member
 
pushgears's Avatar
 
Join Date: May 2003
Location: Westchester NY
TDI(s): 2012 A3 TDI
Fuel Economy: 38.8 mpg
Default Feeling the Regen while driving

Does anyone else feel their TDI regenerating on the highway? I've noticed the feeling of driving into a headwind at times, and even what feels like the tranny slipping a little. It seems to be most noticeable when cruising at 75-80 mph. Is this the "passive" regen at work?
__________________
Pushgears
pushgears is offline   Reply With Quote
Old June 6th, 2016, 11:27   #2
Mark SF
Veteran Member
 
Join Date: Sep 2015
Location: SF Bay Area
Default

Nope. Only way I can tell is when I stop at lights, and it's idling at 900 rpm.
Mark SF is offline   Reply With Quote
Old June 7th, 2016, 05:25   #3
meerschm
Veteran Member
 
meerschm's Avatar
 
Join Date: Apr 2009
Location: Fairfax county VA
Default

I have a PF03 installed and watch codes which reveal the ECU status codes related to regen.

the only time I can detect a difference, is when it goes into an NOX cat regen. and only under some conditions.

(moderate speed and light throttle)

http://www.natef.org/NATEF/media/NAT...-0-TDI-SSP.pdf

see page 72

Passive regeneration is just that, passive.

no engine parameter modification is called for, just the result of operation, at say, highway speeds or up hills. any time the catalyst temperature is high enough, and there is enough O2 in the exhaust, the DPF will convert captured soot into CO2.
__________________
Mike

Free advice: it is worth what you pay for it. (sometimes)
meerschm is offline   Reply With Quote
Old June 8th, 2016, 18:02   #4
pushgears
Veteran Member
 
pushgears's Avatar
 
Join Date: May 2003
Location: Westchester NY
TDI(s): 2012 A3 TDI
Fuel Economy: 38.8 mpg
Thumbs up

It must be the NOX cat regen that I occasionally feel then.

BTW - Incredible teaching manual - thx for sharing
__________________
Pushgears
pushgears is offline   Reply With Quote
Old June 10th, 2016, 05:06   #5
meerschm
Veteran Member
 
meerschm's Avatar
 
Join Date: Apr 2009
Location: Fairfax county VA
Default

Just sharing what was earlier shared on these pages.
__________________
Mike

Free advice: it is worth what you pay for it. (sometimes)
meerschm is offline   Reply With Quote
Old June 14th, 2016, 21:05   #6
2015vwgolfdiesel
Veteran Member
 
2015vwgolfdiesel's Avatar
 
Join Date: Jan 2016
Location: Oklahoma
Fuel Economy: City mid 40s ~ Road mid 50s ~ Two (2) 61 MPG fill ups
Default

Quote:
Originally Posted by Mark SF View Post
Nope. Only way I can tell is when I stop at lights, and it's idling at 900 rpm.

My normal idle is 800

My RE-GEN is at 1,000
2015vwgolfdiesel is offline   Reply With Quote
Old June 15th, 2016, 06:18   #7
spaceCadet
Newbie
 
Join Date: Sep 2013
Location: denver
Default

mine runs like a washer full of bricks when its in a cycle.
spaceCadet is offline   Reply With Quote
Old June 16th, 2016, 00:01   #8
MVJetta
Veteran Member
 
Join Date: Nov 2012
Location: Reno, NV
TDI(s): 2012 Jetta
Default

While in regen, my front tires like to chirp easier when I floor it from a stop.
__________________
- '02 Aprilia Mille RSV-R - '05 Dodge Durango Hemi - '07 G35S
MVJetta is offline   Reply With Quote
Old June 16th, 2016, 14:09   #9
meerschm
Veteran Member
 
meerschm's Avatar
 
Join Date: Apr 2009
Location: Fairfax county VA
Default

for the more anal reader, I ran a log last month including a DPF regeneration, and caught some time stopped in traffic during the regen.

idle speed 943 during the regen

idle speed 828 after starting, before regen

and idle seems to be 851 for a while after the regen.

Happy to share the file if anyone really cares.
__________________
Mike

Free advice: it is worth what you pay for it. (sometimes)
meerschm is offline   Reply With Quote
Old June 16th, 2016, 15:24   #10
stoner-tdi
Veteran Member
 
Join Date: Nov 2015
Location: cypress, TX
Fuel Economy: 38 right now... going for more
Default

My car almost feels like it will have a single missfire or a single hiccup while driving before regens.. It will do it a few times while it is “thinking” about it.. Then the cat temps normally start to go up shortly after.. If I use an fuel additive I feel it less.. I don't know if it is normal but I have deemed it as..

Last edited by stoner-tdi; June 16th, 2016 at 16:39.
stoner-tdi is offline   Reply With Quote
Old June 19th, 2016, 22:53   #11
buyingconstant7
Veteran Member
 
buyingconstant7's Avatar
 
Join Date: Jul 2014
Location: Calgary, Alberta
Fuel Economy: 5.7l/100km(winter) 5.0l/100km(summer)
Default

I certainly notice my 2013 Jetta regenning on the highway. Sometimes its completely muted and I don't notice it's doing a regen until I look at my scangauge and see my DPF temps at 1,200F. Then there are times when it stutters, or lightly jerks and I know exactly what it's doing when I feel it.
__________________
buyingconstant7 is offline   Reply With Quote
Old June 20th, 2016, 14:12   #12
Gael
Newbie
 
Join Date: Sep 2013
Location: AZ
Default

Yeah, I can feel when my car is going through a regen, I can feel the car buck/surge a few times before it clears up usually.
Gael is offline   Reply With Quote
Old June 20th, 2016, 16:20   #13
nucklehead
Veteran Member
 
nucklehead's Avatar
 
Join Date: Jan 2014
Location: Ephrata Washington
Fuel Economy: 37
Default

With mine the only indication I get is a lower than normal MPG reading off the dash display. My TDI normally idles at 900rpm's - it increases to around 950 during a regen. When I first got the car I was surprised the first time I shut it off and interrupted a regen cycle - the fans were on very low speed after shutting it off. That is when I discovered it might not have been the best choice for my driving needs. My most often 'commute' is to-from the golf course (I'm retired) which is 2 miles of in-city and 5 miles of highway driving. VW did not cover this in any of the literature I read. Edmunds.com didn't cover this aspect of car buying either. I should have delved into the TDI further prior to buying this car but I'm not at all unhappy with it - in three years and 19000 miles I haven't had a single problem with the car.

I have a Scangauge II installed now and can see the regen coming by the increased exhaust gases. Things get very hot during a regen. This cannot be good for long term longevity IMO. The Malone 2.0 tune with RawTek exhaust replacement should cure that. Just gotta get to June 28th to see where we are with these cars. One more week eh?
__________________
Current Garage Queen - 1993 Miata Soft Top

Current Daily - 2013 Golf TDI/DSG

Sold Back To VW/Dec 2016 - 2013 Jetta TDI Premium W/25k Miles & 40.1MPG over 3 Years
nucklehead is offline   Reply With Quote
Old June 20th, 2016, 17:40   #14
Jeta Life
Veteran Member
 
Join Date: Jun 2015
Location: NJ & North Pocono
Default

Quote:
Originally Posted by spaceCadet View Post
mine runs like a washer full of bricks when its in a cycle.
I gather your TDI may be due for some maintenance. Regeneration, what in the world will VW engineers come up with next. Must admit I liked the idea of an NOx trap over a silly AdBlue tank.

A 2014 Passat owner I spoke to on the street thought my 2009 was ALH-like as it has no AdBlue, which is a pretty cool thing. He was wrong but when I tried explaining Dieselgate he still thought himself to be in a bad situation.

Then I thought to myself why us Volkswagen owners are different. We talk about regens, DPFs, HPFPs, AdBlue, etc. Who else in the car world even know what these things mean.

An elderly man at an auto service place nearing retirement where I took the wife's car in for an oil change told me I knew more about diesels than he ever cared to know. That's when it struck me, just drive the darned thing and stop worrying, sure not easy I know.
Jeta Life is offline   Reply With Quote
Old June 20th, 2016, 21:13   #15
mydecember1985
Veteran Member
 
Join Date: Mar 2015
Location: Florida
Default

I certainly feel mine regen. It's not a "limp mode" feeling but as you say, it feels like a headwind. Occasionally I get little spurts or power surges that make then engine react a little strange.
Just had the 40k mile service done, so everything is up to date.
__________________
2011 JSW 6M w/Hole in Roof



mydecember1985 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Strange regen anomaly- Have you experienced a really long regen? DerekG VW MKVI-A6 Golf family including Jetta SportWagen (~ 2010-2014) 36 November 15th, 2019 09:03
Feeling the regen? Bob V VW MKVI-A6 Jetta Sedan (~ 2011+) 16 January 17th, 2015 11:42
loose feeling front end when driving??? mcarlito TDI 101 1 August 12th, 2014 10:02
Loose feeling front end when driving??? mcarlito VW MKIV-A4 TDIs (VE and PD) 2 August 10th, 2014 20:38
Driving style during regen? Henrick TDI 101 23 December 2nd, 2012 15:24


All times are GMT -7. The time now is 06:15.


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 0.20189 seconds with 13 queries
[Output: 126.36 Kb. compressed to 105.09 Kb. by saving 21.27 Kb. (16.83%)]