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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.

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Old February 23rd, 2018, 12:21   #1
dunerking
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Default 04 Jetta just quit running..

Driving home in the 04 Jetta(mileage 173k miles) when I exited the freeway. Made the turn off of off ramp with normal running conditions and as I approached intersection noticed,felt and hear what seemed as a release of boost. I rolled to the stop light and made a right turn and immediately noticed a huge lack of boost.. it then stopped running. I tried to restart which it did but idles rough then turned itself off. Any ideas of where to start looking? I know I need it Vag to check codes. Thanks for any info.
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Old February 23rd, 2018, 12:29   #2
oilhammer
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Where to start looking?

Under the hood.

I am betting it will be pretty obvious, as my crystal ball has been recently calibrated, and it is telling me the charge air tube came off the throttle valve.
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Old February 23rd, 2018, 12:51   #3
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I assumed under the hood...thanks.
I'll inspect the charge air tube once I get home from the tow. Fingers crossed its something simple. Thanks
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Old February 23rd, 2018, 13:14   #4
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Also take a gander at the turbo itself. It's kinda rare, but it has occurred where the turbo breaks, blocking airflow. Usually this will show as a start and run for maybe a second their it starves of air.

Here's hoping for a boost tube!
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Old February 23rd, 2018, 13:41   #5
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All hoses appear to still be connected. I removed the quick release clip and noticed oil in the throttle valve and hose.
I'll climb under the car and inspect the turbo...it did do what u described with running for a few seconds then shutting off.
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Old February 23rd, 2018, 14:20   #6
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Also noticed oil residue around connections near intercooler,as well around connection from turbo. No noticeable cracks on the turbo,but could be internal. Was going to remove connection and inspect next.
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Old February 24th, 2018, 06:50   #7
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Oil accumulated on the hose connections is typical. You could pull the hose that goes into the intercooler and see if oil pours out. A bit of oil is typical, but more than a few ounces is a red flag that the turbo has failed.
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Old February 24th, 2018, 09:05   #8
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Check the lower, short hose connection to the IC. Mine had popped off due to worn nubs.
The connection was very greasy.
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Old February 24th, 2018, 09:38   #9
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Thanks for the help and suggestions!

I inspected most if not all connections and besides the oil residue seemed good. The connections at the throttle valve seemed to have some play but was still connected. My neighbor has a standard code reader which I know isn't a VAG/Ross tech tool but maybe it could shoot me in some sort of direction.
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Old February 25th, 2018, 12:54   #10
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I'll able to remove the inlet to the turbo and I'm pretty confident that it's done...wish I could post a pic. Im unable to spin the impeller as it's solidly stuck into the housing. I'm considering the VNT 17 for replacement and other suggestions? Thanks.
I wish oilhammers recently recalibrated crystal ball was correct with the hose from the throttle valve...may need a recalibration..lol
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Old February 25th, 2018, 16:42   #11
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Looking for any suggestions of skilled LA area TDI mechanics(I had used Matt prior to moving up North,and still would) trusted in this project.
Also interested in any suggestions of what all to do while it will be this deep in a project. The timing belt and WP had been changed 45k miles ago. Should I have the intake manifold inspected? Also inspect cam?
I like the idea of the VNT 17 upgrade as well as a mild tune...but it still needs to pass Ca smog. Thanks for all advice and suggestions.
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Old February 25th, 2018, 16:51   #12
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Yeah. Hate to be the bearer of bad news.

Well, you aren't the first one in this boat, search around a bit and see what's available before jumping in. And stay away from Prothe parts. If you are imfamiliar with him, check out the vendor section.
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Old February 25th, 2018, 17:01   #13
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Thanks white dog! I always have purchased my parts from IDParts,and probably go the same route with this project.
Just wish I knew what I could've done to have avoided this or to avoid it happening again. There was no signs of it acting up prior to it letting go.
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Old February 25th, 2018, 17:12   #14
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I don't know the root cause of these failing. Maybe Oilhammer can she'd some light with his experience.
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Old February 26th, 2018, 04:13   #15
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Hehe, my remark about a crystal ball was to point out the absurdity of asking for help before you've even given a precursory look-see. However, the issue of the charge air tube popping off up top is a very, VERY common one, and there is a fix for that, that is much less costly than a new tube.

www.IDparts.com has Garrett VNT17 turbochargers (and the different EGR pipe needed) for a drop in replacement for your BW turbo.

The BorgWarner turbochargers are much more likely to suddenly die, although on the BEWs it seems far less of an issue than on some of the other engines. Running the engine low on oil even once can damage ANY turbocharger, though.

You may want to get a new oil feed pipe just in case yours won't come loose at the turbo, as that seems to be a 50-50 shot for me lately.
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