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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).

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Old January 2nd, 2013, 13:11   #1
muhibmc
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Exclamation 2006 Jetta TDI Problem

I replaced the Timing belt, Camshaft, All filters less than 3000km ago. it drove fine for a while but now that the weather has gotten a lot colder this new problem has just started.

After the car has sat for the night, i start the car up in the morning without any issue. if i start driving or revving the engine cold i begin experience the following issue.

If it happens while driving usually happens within the first km or two:

a sudden loss of power, the engine starts stumbling, rpm drops and can not be maintained. if try to continue driving the engine stalls and turns off. i can get it started again without issue, but the problem is usually still there and still i am unable to drive the car.

If it happens when the car is at idle:

if i am revving the cold engine all of the sudden the engine noise changes and the rpm drops, and at this point i cannot drive the car and if i try to press the accelerator the rpm is very choppy.

if i turn the car off leave it for a few minutes (5-10) then start it back up again the engine is back to normal. while driving the turbo boost is just as it should be...there are no weird noises from the engine no smoke during acceleration (when the car is warm)

i have uploaded 2 videos to youtube to show you the issue please follow the links

http://www.youtube.com/watch?v=aBFgpSIjGV8

http://www.youtube.com/watch?v=xH3PJ1KU0vc

a couple times now the glow plug light has flashed when i was driving. but this doesnt affect the performance of the car at all. upon checking it with a code reader ( not VCDS, just a VW scanner by Autel ) it shows a code for the brake light switch, and nothing else. i did buy a new one and will be putting it in tonight.

but i dont think that can be the issue can it?
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Old January 2nd, 2013, 19:47   #2
V-Rod
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In case you havent, change your fuel filter and put some injector cleaner/conditioner in. That would be the first thing I would do.
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Old January 2nd, 2013, 20:11   #3
muhibmc
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The fuel filter was replaced 2000km ago. I think it may be ok. I'm pretty sure fuel delivery is not an issue, I can hear the fuel pump run before I start the car. Plus on the lucky days when this problem doesn't happen the car runs absolutly fine...
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Old January 2nd, 2013, 21:37   #4
bcautosound
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Unplug anti shudder valve and see if problem goes away. It will throw a DTC when you do this.

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Old January 3rd, 2013, 02:49   #5
2STROKECORKY
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i would recomend you check your timing real quick,

a friend of mine had the same issue, he replaced the belt for a non genuine item and had similar issues
dont forget that while the engine is cold the timing is at its most advanced state, so you could have had a point where the timing has knocked out slightly as my pal did.
he replaced the belt for a genuine item and all was well, while he removed the belt he had just put on he marked it all up, and it turned out he had a dodgy belt
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Old January 3rd, 2013, 05:50   #6
James & Son
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If its fuel related could be the lift pump. Do a search. It could be an intermittent electrical short to the coolant temp sensor wiring at the connector where the wires are crossed over one another and wear through and short intermittentantly. The sensor I am talking about is between the oil filter and air box and mounted on the block. I have also heard of the wiring loom in this same area having wiring start to fry do to vibration. Do a search Bob S as I think he was the one most involved with that one. Otherwise had both the problems initially mentioned.
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Old January 3rd, 2013, 08:52   #7
muhibmc
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Quote:
Originally Posted by 2STROKECORKY View Post
i would recomend you check your timing real quick,

a friend of mine had the same issue, he replaced the belt for a non genuine item and had similar issues
dont forget that while the engine is cold the timing is at its most advanced state, so you could have had a point where the timing has knocked out slightly as my pal did.
he replaced the belt for a genuine item and all was well, while he removed the belt he had just put on he marked it all up, and it turned out he had a dodgy belt
The belt that I used was a gates one (t333), which is comparible to oem if I'm not mistaken. I'll check the timing again.

But if it was the timing then wouldn't this issue be there at all times?
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Old January 3rd, 2013, 10:28   #8
mu3098
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I would recommend trying a good fuel additive with anti-gel in it. It is possible that you got a bad tank of fuel that has not been blended/conditioned for the colder temperatures we have been getting recently.
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Old January 3rd, 2013, 12:17   #9
muhibmc
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Thanks, I've had this problem for at least 1000km. I've refuelled in between. I've tried diesel purge.

Btw the problem happened this morning again and I'm getting new codes 01027 and 01393.

I can't find any info on these, does anyone have any idea?
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Old January 3rd, 2013, 13:34   #10
Barnitz
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Even though it's been 2000km since you changed the fuel filter, it could still be clogged. One tank of bad fuel can clog it. Also, like stated above, you could have fuel gelling, especially if this is only happening when it is super cold.
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Old January 3rd, 2013, 15:22   #11
muhibmc
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I ruled out fuel delivery issues because, on some days with the temperature just as cold there are no issues at all.

I changed the brake light switch with an updated one from Vw, the fault code for the brake switch is gone. But other 2 codes are still there 01027 and 01393. I couldn't find anything on these codes.

Does anyone have any idea what they might be for?

I'm beginning to think it may be a sticking egr valve is there any way to test it?
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Old January 3rd, 2013, 20:22   #12
Barnitz
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have you tried what bcautosound suggested? Unplugging the ASV.
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Old January 4th, 2013, 18:21   #13
muhibmc
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i haven't tried unplugging the ASV, but i did take apart the whole intake assembly and clean it, it wasn't too bad but you never know, hopefully that should of fixed it. I cleared all the codes.

ill update the thread if there is any progress.
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Old January 8th, 2013, 09:19   #14
muhibmc
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Its been a couple of days since i cleaned the egr system and the intake.

The good news so far is that the issue has not come back. Hopefully that was the end of it. I had absolutely no issues starting it up and driving after sitting in nights as cold as -11*C.

Just as a precaution, is there any routine that i should follow when starting up and driving a tdi after sitting in the cold winter nights?
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Old January 8th, 2013, 11:30   #15
GoFaster
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I had a similar stumble-stall a couple minutes after a cold start, yesterday. First time it has ever happened and it came out of the blue. I tried re-starting ... first time, fired up and ran for a second then stalled, waited 30 seconds, second time no fire, waited a minute, third time it started up as if nothing had happened and has continued to run fine ever since.

On the time that it happened, the fuel tank had something over half a tank of Esso fuel, which I don't normally use, and it was the coldest night thus far. I refilled with Shell V-power.

No fault warning lamp.

I tend to suspect that it was a bad tank of fuel, and if this has been happening to others, it might be an inadequately winterized batch from the refinery. I know mine will be due for a fuel filter in another 4000 km.

Try switching fuel brands.
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