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 MKV-A5 Golf/Jettas

VW MKV-A5 Golf/Jettas Discussions area for A5/MkV Jetta/Golf (2005/2006 PD and 2009 CR).

Thread Tools
Old March 11th, 2011, 19:49   #1
Join Date: Feb 2005
Location: ottawa canada
Default help...random hard start 2006 jetta tdi

I've had random hard starts (summer/winter) since the car had 40000km on it. The dealership replaced fuel pump at 40000km in the tank. This winter I've had 3 times where it takes about 5 minutes of cranking (on and off) untill car fires up. Last night I fired her up...been sitting in a garage for a week and it started and ran no problem, today..wife goes to take the car and no start, I get home and crank it for about 5 min (on and off) until it finally started to kick and then fire up...what is going on? Anybody have any ideas? Car now has 107000 km's on it and has always had oil changed at dealer and serviced there....dual mass flywheel was replaced 7000 km ago but I don't think the 2 are related. Car kinda chuggs when cold too.
2001 jetta TDI somebody else's car now

1990 4 runner
2006 jetta TDI shadow blue
cptdi is offline   Reply With Quote
Old March 12th, 2011, 09:31   #2
Join Date: Feb 2005
Location: ottawa canada

update..have it narrowed down but no idea why it's doing what it is. Car can sit for 1 week and start no problem..if I start the car and run it for less than a minute and shut it down..2hours later it won't start easily. Got it started last night after about 4-5 minutes of cranking..let it run in driveway for 45 minutes and put it back in garage..this morning I reached in and turned the key..fired up right away and I turned it off...2 hours later I leave to go for a rip to the store and it starts after 3 cycles of cranking..it can sit for a week now and will fire up right away..I just don't get it..what am I missing? Obviously fuel is not leaking back because it will start a week from now no problem but after a quick fire up and shut down she will not easily start again next time.
2001 jetta TDI somebody else's car now

1990 4 runner
2006 jetta TDI shadow blue
cptdi is offline   Reply With Quote
Old March 16th, 2011, 07:04   #3
TDI-Geek's Avatar
Join Date: May 2007
Location: Ohio

I have a 2006 with this same issue, Started last year and they replaced the fuel relay. No problem for 10 months then hard/no start again. Just got it back from the dealer and they replaced the lift pump. So far no problems but as you know it is an intermittent problem. I was also told that the fuel relay has been upgraded for some reason so that is where i'm going if it acts up again.
TDI-Geek is offline   Reply With Quote
Old March 16th, 2011, 07:31   #4
Veteran Member
Sweeps's Avatar
Join Date: Jul 2005
Location: Orillia, Ontario, Canada

Have a look at the wiring harness under the air box.

I had two severed wires that go to the Crank Position Sensor / Engine Speed Sensor or whatever its proper name is.

I had similar issues, but not quite the same, then it got worse and the car wouldn't start at all. (Plus I got check engine light / no tach / oil light etc)

I'll put money that you have chafed / worn wires in the loom. Have a local guru have a look, if that's the issue, they'll most likely be able to repair it.

Now my car had 280,000km on it, but you could have the issue with so few miles on the car.
- MK4, MK5, MK6 Jetta TDI's in the past
- 2013 Outback 2.5i - wife's commuter
- Subaru Demo
- 02 BMW 330i - weekend fun.
Sweeps is offline   Reply With Quote

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
98 Jetta tdi Hard to start hot, now no start DRVRFWND VW MKIII-A3/B4 TDIs 6 February 7th, 2011 23:01
2003 Jetta TDI hard start howiedigit TDI 101 1 December 15th, 2010 18:57
2006 Jetta hard to start.. vacuum leak? bigtree TDI 101 6 November 15th, 2010 10:49
01 Jetta TDI hard to start at all Strykeviper VW MKIV-A4 TDIs (VE and PD) 35 April 10th, 2010 07:55
1997 jetta tdi - hard to start... nitroman TDI 101 2 April 16th, 2008 11:12

All times are GMT -7. The time now is 10:25.

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 0.13962 seconds with 10 queries
[Output: 64.10 Kb. compressed to 57.38 Kb. by saving 6.72 Kb. (10.49%)]