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 B5 Passat TDIs

VW B5 Passat TDIs This is a general discussion about B5 Passat(>98 (2004-2005 in North America)). Non TDI related postings will be moved or removed.

Reply
 
Thread Tools
Old January 14th, 2019, 16:45   #1
rpatricky
Newbie
 
Join Date: Sep 2010
Location: Michigan
Default 05 Passat BHW MAF/not MAF issue

Hello everyone. I have lurked here for a long time learning and researching and using the information to modify and fix my 05 Passat BHW TDI and really appreciate all the knowledge provided by this community.

The car has 314,000 miles and balance shaft conversion has been done.
Original turbo
No loss of power on acceleration
Uses about 1/2 quart of oil at 6k on the oil changes

Now...on to my dilemma.
So...my car developed a studder in the idle when in park or stopped in gear. It is producing white unburnt fuel out the exhaust until I add throttle and a MAF code appeared (now I cannot remember the number).
I unplugged the MAF and it idles smooth and doesn’t blow white smoke at idle anymore. Needless to say I replaced the MAF, plugged it in and back to rough idle.
Below is a list of everything I have had done since replacing the MAF.
New EGR installed
New seals and clamps on all Boost pipes (7 in total)
New tandem pump
Valve cover gasket (leaking at the time)
Checked cam lobes and were smooth with no noticeable wear.

The oil cap dances like crazy when unscrewed from blowby produced from somewhere?? Thinking if it were rings I’d have more oil loss...

Any ideas on what else I should be looking at/replacing? I am at a loss here and appreciate any and all input.
rpatricky is offline   Reply With Quote
Old January 16th, 2019, 10:18   #2
rpatricky
Newbie
 
Join Date: Sep 2010
Location: Michigan
Default Maybe MAP sensor?

Think the MAP sensor could have anything to do with it or maybe the new MAF is bad?
rpatricky is offline   Reply With Quote
Old January 16th, 2019, 10:33   #3
oilhammer
Certified Volkswagen Nut Vendor
 
oilhammer's Avatar
 
Join Date: Dec 2001
Location: St Louis
Fuel Economy: fantastic
Default

What is the actual vs. requested MAF values at idle? Any coolant loss at all?
__________________
oilhammer
www.cardocautomotive.com
oilhammer is offline   Reply With Quote
Old January 16th, 2019, 10:45   #4
rpatricky
Newbie
 
Join Date: Sep 2010
Location: Michigan
Default

I’m not sure and will have to take it back to my friends shop to get that information. No coolant loss at all.
Is there anything down by the turbo I should be checking?
If it were injectors wouldn’t it stay at a crappy idle with MAF plugged in?

This whole thing is perplexing me and is frustrating. I appreciate the help.
rpatricky is offline   Reply With Quote
Old January 16th, 2019, 10:54   #5
oilhammer
Certified Volkswagen Nut Vendor
 
oilhammer's Avatar
 
Join Date: Dec 2001
Location: St Louis
Fuel Economy: fantastic
Default

No coolant loss at all would rule out a leaking EGR cooler, so that's good.

Next step is scan tool. Shotgunning parts at a car without making use of the OBD that is already there will become an expensive and time consuming endeavor.
__________________
oilhammer
www.cardocautomotive.com
oilhammer is offline   Reply With Quote
Old January 16th, 2019, 11:07   #6
rpatricky
Newbie
 
Join Date: Sep 2010
Location: Michigan
Default

Yeah. I know. I’ll get it to the shop when I am able and will reinspect the cam as well. From all I am reading I find it hard to believe at over 300k miles it isn’t worn somewhere.
rpatricky is offline   Reply With Quote
Old January 16th, 2019, 11:29   #7
oilhammer
Certified Volkswagen Nut Vendor
 
oilhammer's Avatar
 
Join Date: Dec 2001
Location: St Louis
Fuel Economy: fantastic
Default

I have PD engines with over 300k on the original cams through here all the time.
__________________
oilhammer
www.cardocautomotive.com
oilhammer is offline   Reply With Quote
Old January 16th, 2019, 11:52   #8
rpatricky
Newbie
 
Join Date: Sep 2010
Location: Michigan
Default

Good to know. Thanks
rpatricky 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
looking for BHW ECU pin-out diagram (MAF pins) Vince Waldon VW B5 Passat TDIs 11 September 25th, 2017 10:48
2004 Passat Deleted EGR now have MAF issue toolmangary VW B5 Passat TDIs 10 October 21st, 2016 13:36
Wanted - Dead BHW MAF QuickTD Ontario 0 June 25th, 2016 13:18
Is the a MAF issue, or sticky VNT issue? VCDS 003 / 011 logs Shawnz VW MKIV-A4 TDIs (VE and PD) 0 May 21st, 2012 22:11
NEED MAF..05 nb tdi what? Private TDI Items for Sale/Wanted 1 July 4th, 2009 10:16


All times are GMT -7. The time now is 15:57.


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 0.13604 seconds with 13 queries
[Output: 84.27 Kb. compressed to 72.59 Kb. by saving 11.68 Kb. (13.87%)]