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 > TDI Model Specific Discussions Areas > VW MKIV-A4 TDIs (VE and PD)

VW MKIV-A4 TDIs (VE and PD) This is a general discussion about A4/MkIV Jetta (99.5-~2005), Golf(99.5-2006), and New Beetle(98-2006). Both VE and PD engines are covered here.

Reply
 
Thread Tools
Old December 10th, 2017, 14:12   #1
rpm-inc
Member
 
Join Date: Aug 2017
Location: illinois
TDI(s): 2000 beetle
Default Boost log graph

I don't have excel and wouldn't know how to use it if i did. Could somebody graph it for me and post it here? I can email the csv file. Thanks!
rpm-inc is offline   Reply With Quote
Old December 10th, 2017, 18:37   #2
rpm-inc
Member
 
Join Date: Aug 2017
Location: illinois
TDI(s): 2000 beetle
Default

https://log.malonetuning.com/chart/3...wNAgAAAA%3D%3D

Getting the car 100% for a tune. And look what malone has! It will be getting a malone tune....

So how does this graph look? Seems lazy at first? Thought it should spike and then settle back down?

Or this one....(EDIT)
https://log.malonetuning.com/chart/3...Ojw4LClsKNAAAA

Last edited by rpm-inc; December 10th, 2017 at 18:45.
rpm-inc is offline   Reply With Quote
Old December 10th, 2017, 18:50   #3
rpm-inc
Member
 
Join Date: Aug 2017
Location: illinois
TDI(s): 2000 beetle
Default

4th gear from 2100 to 3800
rpm-inc is offline   Reply With Quote
Old December 11th, 2017, 16:18   #4
rpm-inc
Member
 
Join Date: Aug 2017
Location: illinois
TDI(s): 2000 beetle
Default

Any comments? Look fairly normal? :-)
rpm-inc is offline   Reply With Quote
Old December 11th, 2017, 19:36   #5
wonneber
Veteran Member
 
Join Date: Oct 2011
Location: Monroe, NY, USA
Default

The 2 boost graph's are very close together.
I'm not an expert but Mine vary from each other more.
I also may have a bit of sticking in the turbo.
wonneber is offline   Reply With Quote
Old December 11th, 2017, 21:58   #6
UhOh
Veteran Member
 
UhOh's Avatar
 
Join Date: Dec 2014
Location: PNW
Default

Actual boost is dropping off when it shouldn't be. Not sure what that little spike drop is there, but that ain't right either. N75 looks "lazy" to me: don't ask me what that means (it just "looks" lazy- might be because boost doesn't look like it's real quick, hence the N75 doesn't have to react quickly?).

I believe that Malone's instructions say to run from 1,800 rpm to redline, in third gear; burying the pedal and keeping it that way.

Here's a graph from my son's car, stock tune but T4 nozzles (note how boost shoots up an is knocked back down and then holds very well to Requested):

https://log.malonetuning.com/chart/3...PDgsKWwo0AAAA=
UhOh is offline   Reply With Quote
Old December 12th, 2017, 09:18   #7
wonneber
Veteran Member
 
Join Date: Oct 2011
Location: Monroe, NY, USA
Default

Quote:
Originally Posted by UhOh View Post
Actual boost is dropping off when it shouldn't be. Not sure what that little spike drop is there, but that ain't right either. N75 looks "lazy" to me: don't ask me what that means (it just "looks" lazy- might be because boost doesn't look like it's real quick, hence the N75 doesn't have to react quickly?).
Could this be a bad MAF sensor?
Would MAF logging with the boost & N75 help?
Maybe a look inside the EGR valve to see if it and the intake are clogged?
wonneber is offline   Reply With Quote
Old December 12th, 2017, 15:58   #8
rpm-inc
Member
 
Join Date: Aug 2017
Location: illinois
TDI(s): 2000 beetle
Default

Quote:
Originally Posted by wonneber View Post
Could this be a bad MAF sensor?
Would MAF logging with the boost & N75 help?
Maybe a look inside the EGR valve to see if it and the intake are clogged?
I can do another log. Previous owner said he cleaned the intake when he deleted the egr/asv. Should probably do a log with the n18 connected to the turbo actuator?
rpm-inc is offline   Reply With Quote
Old December 12th, 2017, 20:13   #9
wonneber
Veteran Member
 
Join Date: Oct 2011
Location: Monroe, NY, USA
Default

You could swap them around.
Include block 11 also with the log.
wonneber is offline   Reply With Quote
Old March 3rd, 2018, 14:28   #10
rpm-inc
Member
 
Join Date: Aug 2017
Location: illinois
TDI(s): 2000 beetle
Default

Didn't do much about this until recently. Started overboosting and going into limp mode. Swapped the n75 for the n18, and stopped overboosting, but was very laggy. Installed a new Pierburg n75, and the lag is gone. Logged this today. Is the maf bad.


https://log.malonetuning.com/chart/2...7CtzkrGsOCAAAA
rpm-inc is offline   Reply With Quote
Old March 3rd, 2018, 14:41   #11
BobnOH
not-a-mechanic
 
Join Date: May 2004
Location: central Ohio
Fuel Economy: 50/45/35
Default

There's also this, if you want to do it on your pc-
Dropbox link - LogPlottingApplication.zip
BobnOH is online now   Reply With Quote
Old March 7th, 2018, 02:31   #12
UhOh
Veteran Member
 
UhOh's Avatar
 
Join Date: Dec 2014
Location: PNW
Default

What's the story on this car?

The requested Air numbers look problematic. And the N75 doesn't look like it's doing what it should: max change % is low.

Can you log per Malone's instructions? (they call for a 3rd gear pull from 1,500 rpm to red line)
UhOh is offline   Reply With Quote
Old March 7th, 2018, 09:17   #13
Owain@malonetuning
 
Join Date: Jul 2016
Location: Vancouver
Default

MAF looks fine, it correlates with the boost

https://log.malonetuning.com/chart/2...KHw60owpMrAQAA
__________________

Dealers - malonetuning.com/dealers
We made a free VCDS Log Viewer!

Owain@malonetuning is offline   Reply With Quote
Old March 8th, 2018, 17:09   #14
rpm-inc
Member
 
Join Date: Aug 2017
Location: illinois
TDI(s): 2000 beetle
Default

The car is a 2000 beetle that I bought with a blown 01m. Put a 5 spd in it and timing belt. EGR was deleted by PO. i have put about 4k miles on it since then.

After posting, I did realize that the maf actual is probably following actual boost, not the other way around. At this point I am thinking something is sticky with the actuator or vanes, causing the boost to over and undershoot. I have not done any testing on this. Maybe this weekend. Car has about 140k miles on it.
rpm-inc is offline   Reply With Quote
Old March 8th, 2018, 17:47   #15
BobnOH
not-a-mechanic
 
Join Date: May 2004
Location: central Ohio
Fuel Economy: 50/45/35
Default

They all look fine to me. If you're purchasing a tune from Malone, they should be able to give better analysis (ask). Getting everything squared away before a tune is just smart.
I remember visiting a local guru for service, he had just finished a chip session with Jeff from RC, he had no less than 4 TDIs in the yard awaiting further repair.
BobnOH 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
Overboost ? Log Graph Inside v4id VW MKIV-A4 TDIs (VE and PD) 6 March 29th, 2017 11:18
Boost log graph, sine waves! T-Roy VW MKIV-A4 TDIs (VE and PD) 8 June 15th, 2015 01:31
need advice: boost overcorrect / under shoot with log graph SFHGolfTDI TDI Power Enhancements 12 March 24th, 2015 11:29
Vag com boost log graph borachris TDI Power Enhancements 21 October 30th, 2009 16:17
How to graph MAF log in excel Monkey1 OBD Scanners 1 August 4th, 2007 05:52


All times are GMT -7. The time now is 09:59.


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 0.19743 seconds with 10 queries
[Output: 123.11 Kb. compressed to 102.52 Kb. by saving 20.59 Kb. (16.72%)]