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 > TDI Model Specific Discussions Areas > VW MKVI-A6 Golf family including Jetta SportWagen (~ 2010-2014)

VW MKVI-A6 Golf family including Jetta SportWagen (~ 2010-2014) Discussions area for A6/MkVI (2010-2014) Golf and Golf Wagons (Jetta Sportwagon in the USA).

Reply
 
Thread Tools
Old February 15th, 2020, 10:58   #1
JSH1
Newbie
 
Join Date: Jul 2018
Location: PDX
Default Changed battery / found disconnected intake hose

I pulled the battery to replace it and found an intake hose with an ID of about 1.5 inches disconnected.
What is this hose for and it is possible it was disconnected as part of the emissions Fix or the charge cooler icing problem?

https://photos.app.goo.gl/EYqmp2VmpMVhHSjZA



This is a 2014 Jetta Sportwagen TDI DSG. CPO car with an appointment next week for some issues.

Background

For about 6 months the car occassionally will misfire and bog under acceleration. It is random and can happen a couple times a day or go a month without happening. I hit the throttle to go, the car bogs and looses power, and then clears in about 1 second and takes off.

Last Sunday I had what I thought was an iced charged air cooler. The car started fine at 25F. I drove 30-40 minutes to the snow park to ski. I came back 4 hours latter and the car started then immediately died. (Temp 39F) The next crank got about a 1/2 turn. The 3rd attempt nothing. 4th attempt it cranked fast for a about 2 seconds and started but died again. 5th attempt nothing. I jump started the car and it cranked, ran rough for about 30 seconds and then idled normally. I drove to an auto parts store for a battery capacity test and they said the battery was fine. The lights on the dash were fine, not dim, no warning lights. The next morning the car started again at 22F and it has started and ran find all week until..

Last night (5 days later) the car cranked slow coming home from the store but started. Got home and the voltmeter says 12.4V. Put the battery on a charger and it says it charged to 12.8v but the next morning it is down to 11V and the lights on the dash flicker and lots of buzzers. So the battery is dead, I pull it out and find mystery hose.

So could this hose be causing by misfire under acceleration? For my trip to the dealer should I leave it disconnected tell them about it. Or should I connect the hose and drive the car for a bit to see if it fixes the problem? The car is CPO but they charge a $155 diagnostic fee if they can't replicate a problem and don't fix anything.

Last edited by JSH1; February 15th, 2020 at 11:05.
JSH1 is offline   Reply With Quote
Old February 15th, 2020, 16:19   #2
jhintontdi
Veteran Member
 
Join Date: Jan 2004
Location: PDX
Default

I found my old profile and learned how to embed photos - progress
__________________
jhintontdi is offline   Reply With Quote
Old February 15th, 2020, 16:31   #3
soot1
Veteran Member
Default

That hose is there to bring warm air from behind the engine to the intake, and its purpose is to shorten the time it takes the engine to warm up in cold weather. Therefore, I seriously doubt it is the cause of the problems you are seeing.
soot1 is offline   Reply With Quote
Old February 16th, 2020, 07:55   #4
jhintontdi
Veteran Member
 
Join Date: Jan 2004
Location: PDX
Default

Quote:
Originally Posted by soot1 View Post
That hose is there to bring warm air from behind the engine to the intake, and its purpose is to shorten the time it takes the engine to warm up in cold weather. Therefore, I seriously doubt it is the cause of the problems you are seeing.

Thanks for the reply. Without the warm air from behind the engine would the charge air cooler be more likely to freeze?

While it is likely that my failure to start was due to the battery I still find it really odd that the car would not turn over at all and then the next attempt crank like normal. I have never had a dead battery recover and work for a week after being so dead it would not turn the engine at all.
__________________
jhintontdi is offline   Reply With Quote
Old February 16th, 2020, 09:20   #5
soot1
Veteran Member
Default

Quote:
Originally Posted by jhintontdi View Post
Thanks for the reply. Without the warm air from behind the engine would the charge air cooler be more likely to freeze?
While it is likely that my failure to start was due to the battery I still find it really odd that the car would not turn over at all and then the next attempt crank like normal. I have never had a dead battery recover and work for a week after being so dead it would not turn the engine at all.
If you have enough water in the intercooler hose and the hose is exposed to freezing temperatures, it will completely choke off your air passage into the engine, and you will not be able to start the engine, whether or not the warm air hose is connected. The symptoms you described earlier clearly indicate you have a dead battery. When a battery is about to release its ghost, you can see some really strange behavior, including miraculously coming back to life for a few moments, only to go really dead for good the next minute. Don't spend too much of your time on this, get a new battery, drain the water from the intercooler outlet hose, and move on.
soot1 is offline   Reply With Quote
Old February 16th, 2020, 16:24   #6
jhintontdi
Veteran Member
 
Join Date: Jan 2004
Location: PDX
Default

Well the car has a new battery and still runs rough. It is under warranty so the dealer can sort it out.

Thanks for the replies.
__________________
jhintontdi 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
Hose under air intake disconnected. petee_c VW MKV-A5 Golf/Jettas 2 November 23rd, 2016 12:32
1997 Passat Hesitation Sometimes and oil leak in intake hose, under battery Lazers Machining VW MKIII-A3/B4 TDIs 5 June 10th, 2012 13:00
Is there a disconnected hose next to the battery? epc VW MKVI-A6 Golf family including Jetta SportWagen (~ 2010-2014) 2 July 9th, 2011 15:55
Cooling Fluid Leaked. Intercooler. Hose disconnected Intake Manifold Cleaning jimmyto Ontario 5 June 12th, 2011 20:00
Found vac line disconnected now no brakes. PlantPWR TDI 101 12 January 12th, 2008 16:52


All times are GMT -7. The time now is 07:10.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2020, 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 0.15868 seconds with 13 queries
[Output: 78.24 Kb. compressed to 68.97 Kb. by saving 9.27 Kb. (11.85%)]