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 February 9th, 2017, 14:42   #16
red16vdub
Veteran Member
 
red16vdub's Avatar
 
Join Date: Aug 2013
Location: (617) city of CHAMPIONS
Default

Quote:
Originally Posted by Nevada_TDI View Post
My IQ was set at 3.8 and my FE was terrible; 31 MPG. So I set the adaptation to 32768 and used the hammer mode to get to 5.8-6.2; I need more miles on this tank, but it is obvious mt FE this tank will be significantly better. Raising my IQ may have cost me a little power, but I am not racing her so it is no big deal. She still pulls incredibly hard with the new tune and I may even get my Hwy mileage back into the 50's like it used to be.
Nevada we have similar mods, my IQ is set at 5.5 with the adaptation at 32768 and timing advance to the green line, but within spec like DBW suggested. Slight smoke on tip in but that's it. I usually get 800 miles to a tank at 75mph min. Unless i'm trashing it, My worse ever was in the 650 range.
__________________
Mk1 Gti /scIROCco 16v /A6 quattro sport / Mk4 TDI JSW 5spd
17/56 turbo, RC ASV-5+ @ 28psi, 3 Bar Map, 11mm IP, PD Lift Pump, R520's, McNally boost/egt, Euro FIS full screen Cluster, PD 150 Intake/racepipe, PD 150 plastic T.I.P + R32 maf air mods, Kerma 2.5" Fmic, Kerma 3"T-B exhaust/resonator/ Aero turbine muffler, SBC stage 3 Endurance, GLi brakes F/R , GLi axles, H&R Bilstein sports cup kit.
red16vdub is offline   Reply With Quote
Old September 21st, 2017, 08:14   #17
BigBearTDI
Veteran Member
 
BigBearTDI's Avatar
 
Join Date: May 2005
Location: Bakersfield, CA
Default

So I have been reading about others' IQ values for their cars and I have not seen yet anyone mentioning whether each of the cylinders should have a different IQ value or not. I rented the VCDS from ifixmyvw to program a couple of new keys for my car (great page btw) and started to check a few other things in my car. Noticed that each cylinder has a different value ranging from -0.09 to 0.16...is this normal?? should I be seeing such range between cylinders? here is a screenshot of the VCDS. Your input is appreciated.

PS: I have discovered a totally new world by renting the VCDS cable and I'm seriously thinking about buying one but will need more help on what kind of mods I can do with it. Therefore, there are a lot of things (including in this pic) that I do not understand yet...anyone up to tutoring?!

BigBearTDI is offline   Reply With Quote
Old September 21st, 2017, 11:17   #18
turbovan+tdi
Veteran Member
 
turbovan+tdi's Avatar
Default

Yes, those values will be different as no 2 cylinders will use the same amount of fuel. Those are nice and even, but if say one was 1-2 points out, then that cylinder/injector would have an issue.

Also, the IQ is a bit high, unless its not warm and/or you have the a/c on. You could lower it to around 4.5 and you'll have more power.
__________________
1984 6.2 Diesel Get A Way van, remote turbo setup designed/installed by me, burning anything that burns.
2003 GSW, 2.0L ALH, Colt Cam, 1756 turbo, auto, silver, 380k-Wife's.
2004 GSW TDI, blue, 5 speed-DD-Malone stage 2, no kitty, aeroturbine muffler, PD150's.
2003 JSW 1.8T future TDI, silver. 2006 JSW, TDI 5 speed, blue.
turbovan+tdi is offline   Reply With Quote
Old September 21st, 2017, 11:48   #19
IndigoBlueWagon
TDIClub Enthusiast
Principal IDParts
Vendor
w/Business number
 
Join Date: Aug 2004
Location: South of Boston
Fuel Economy: 50/45/37
Default

Quote:
Originally Posted by JohnTso View Post
The Desert Jetta (stock engine) is running well, but the IQ is 2.5 and timing is very slightly advanced. My thinking is both could be tweak somewhat.
Those sound like good settings. I'd leave it alone. IQ in the 2.0 -3.0 range is usually good. You may want to advance the timing a bit more, but I'm not sure you'll see much benefit.
__________________
2002 Jetta wagon, 357K, RC3+; 1993 Mercedes-Benz 300D 2.5, 197K; 1997 Passat, 284K; '99.5 Golf, 255K; 2011 335d, 54K; 2015 Golf Sportwagen, 4K. Principal, http://www.idparts.com
Kid's cars: 2002 Golf TDI, 2002 Jetta TDI
IndigoBlueWagon is offline   Reply With Quote
Old September 21st, 2017, 11:55   #20
BigBearTDI
Veteran Member
 
BigBearTDI's Avatar
 
Join Date: May 2005
Location: Bakersfield, CA
Default

Quote:
Originally Posted by turbovan+tdi View Post
Yes, those values will be different as no 2 cylinders will use the same amount of fuel. Those are nice and even, but if say one was 1-2 points out, then that cylinder/injector would have an issue.

Also, the IQ is a bit high, unless its not warm and/or you have the a/c on. You could lower it to around 4.5 and you'll have more power.
Thank you for the reply...The car was idle, no AC, no other power-sucking functions on, and the coolant temp was about 65C. I will check the IQ adjustment how-to's and/or youtube for help with this. Seen a lot about the 'hammer-mod' being used if the VCDS adjustment is not enough.

this is where I was at:
BigBearTDI is offline   Reply With Quote
Old September 22nd, 2017, 11:11   #21
turbovan+tdi
Veteran Member
 
turbovan+tdi's Avatar
Default

5.4 isn't bad. If you are happy with the power, leave it alone.
__________________
1984 6.2 Diesel Get A Way van, remote turbo setup designed/installed by me, burning anything that burns.
2003 GSW, 2.0L ALH, Colt Cam, 1756 turbo, auto, silver, 380k-Wife's.
2004 GSW TDI, blue, 5 speed-DD-Malone stage 2, no kitty, aeroturbine muffler, PD150's.
2003 JSW 1.8T future TDI, silver. 2006 JSW, TDI 5 speed, blue.
turbovan+tdi is offline   Reply With Quote
Old September 22nd, 2017, 13:04   #22
IndigoBlueWagon
TDIClub Enthusiast
Principal IDParts
Vendor
w/Business number
 
Join Date: Aug 2004
Location: South of Boston
Fuel Economy: 50/45/37
Default

If the car has stock nozzles (in good condition) I think 5.4 is too high. You'll lose low end torque and it could potentially be harder to start. I'd move it back to 2.4.
__________________
2002 Jetta wagon, 357K, RC3+; 1993 Mercedes-Benz 300D 2.5, 197K; 1997 Passat, 284K; '99.5 Golf, 255K; 2011 335d, 54K; 2015 Golf Sportwagen, 4K. Principal, http://www.idparts.com
Kid's cars: 2002 Golf TDI, 2002 Jetta TDI
IndigoBlueWagon is offline   Reply With Quote
Old September 25th, 2017, 10:53   #23
Nevada_TDI
Veteran Member
 
Join Date: Aug 2008
Location: Reno, sort of...
Default

Quote:
Originally Posted by red16vdub View Post
Nevada we have similar mods, my IQ is set at 5.5 with the adaptation at 32768 and timing advance to the green line, but within spec like DBW suggested. Slight smoke on tip in but that's it. I usually get 800 miles to a tank at 75mph min. Unless i'm trashing it, My worse ever was in the 650 range.
Error post.
__________________
_______________
2001 Jetta GL TDI, 35/15% Tint, Ventectomy, Catectomy, EGR-ectomy, Stage 4 TDTuning, PP764's, Stealth 17/56 Garrett, VCDS Hex+CAN, South Bend Daily Driver 2 Clutch, DG Short Shifter, Previous Diesel: 1983 Rabbit Diesel

Last edited by Nevada_TDI; September 25th, 2017 at 10:58.
Nevada_TDI is offline   Reply With Quote
Old September 25th, 2017, 11:04   #24
oilhammer
Certified Volkswagen Nut Vendor
 
oilhammer's Avatar
 
Join Date: Dec 2001
Location: St Louis
Fuel Economy: fantastic
Default

I will comment on IQ settings from my various experiences with them. Most of the time, a stock, healthy, in good order, properly timed ALH will have no need of tweaking anything. They'll start good, they won't smoke, they will have good power, no slow down shudder, and good fuel economy.

But a higher mileage (and by higher, I mean 250k+ miles or more) engine, a modified engine (bigger injector nozzles, bigger pump head, tune, etc.) may require some slight tweaking to find a sweet spot. Usually the need arises from a complaint of slow down shudder, but not always.

In those cases, it quite often becomes a seat of the pants type of thing. And even then, it can really depend on who is wearing the pants. Because not everyone drives exactly the same.

I think a lot of people go looking for problems that do not really exist. If the car is performing well, and has no issues, best to leave it be. Or at least, if you have no other car to compare to, leave it be until you do. Or until you have someone that has driven a lot more of them weigh in on his or her opinion of how the car runs.
__________________
oilhammer
www.cardocautomotive.com
oilhammer 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
Help with IQ not moving with hammer mod. tdanielson95 VW MKIV-A4 TDIs (VE and PD) 10 January 13th, 2016 15:38
Do I need to hammer-mod my pump? IQ=6.9 -Espen- TDI Power Enhancements 10 November 21st, 2012 06:12
Increase IQ with Hammer Mod? MojaveGolf TDI Power Enhancements 11 January 25th, 2008 15:26
IQ setting before hammer mod. Josh_Heide TDI Power Enhancements 2 December 17th, 2005 02:54
How to perform "hammer mod" dkuster VW MKIV-A4 TDIs (VE and PD) 8 November 3rd, 2004 08:42


All times are GMT -7. The time now is 04:09.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2017, 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 0.13455 seconds with 13 queries
[Output: 100.34 Kb. compressed to 86.53 Kb. by saving 13.82 Kb. (13.77%)]