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Old February 9th, 2012, 08:15   #1
TDI817
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Default 2006 Jetta TDI Turbo Problems. Possible Boost leak?

Hey guys,
I just recently starting having this problem where it sounds like boost pressure may be leaking. I have a 2006 Jetta TDI with 121,000 km. Its had a stage 1 Mikro tune since 109,000. At 1800 rpm when I step on the accelerator the turbo spools up very quickly and almost sounds like a blow off valve. Like boost pressure is leaking out. and it stops at 2,000 rpm and then the car takes off as normal. Under normal driving it will not make this sound, Only when I request full power. Iím also getting horrible fuel economy. 500-600km per tank. It was bad before but its just becoming really bad. I know the winter diesel sucks but this is becoming a big concern. There is no extra smoke at full throttle and there isnít any less. There seems to be a slight loss of power going on for the past few months, Very gradual loss of power. In the rain the tires could break lose in any gear at full throttle. Now I can barley get any wheel spin in 2nd gear. Any help is appreciated, Thanks
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Old February 9th, 2012, 21:46   #2
slamhouse
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Turbo vanes get stuck closed?
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Old February 10th, 2012, 07:21   #3
JETaah
 
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Default

It is possible that you have more than one issue.
The turbo vanes are closed too much at full boost position creating back pressure in the exhaust manifold.
Here is a couple of youtube fliks by Jeff Robertson of Rocketchip to describe the condition

http://forums.tdiclub.com/showpost.p...6&postcount=62


http://forums.tdiclub.com/showpost.p...2&postcount=63

There is also the possibility that the EGR cooler is developing a leak at the flap valve bearing on the back of the engine. Thus the hissing. You can check for soot tracks where the lever pivots.

And lastly, there may be camshaft/lifter wear going on under the valve cover. This one is almost a given to some degree.
BRM cam failure - http://forums.tdiclub.com/showthread.php?t=225918
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Old March 15th, 2012, 09:51   #4
TDI817
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Default Problem found

I took my car into sun west VW in Courtney BC and they discovered the problem is a vacuum line has come disconnected as well as my EGR valve is not functioning properly. They said something about a control arm? Im not sure what that means. I know the EGR is exhaust gas recirculation and have a very basic understanding of how it works. They have said it will be about $840 to fix it. That seems extremely expensive. I'd found a EGR valve online for $250. Does anyone have an suggestions?
Thanks
-Bret
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Old March 16th, 2012, 07:19   #5
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Quote:
Originally Posted by TDI817 View Post
I took my car into sun west VW in Courtney BC and they discovered the problem is a vacuum line has come disconnected as well as my EGR valve is not functioning properly. They said something about a control arm? Im not sure what that means. I know the EGR is exhaust gas recirculation and have a very basic understanding of how it works. They have said it will be about $840 to fix it. That seems extremely expensive. I'd found a EGR valve online for $250. Does anyone have an suggestions?
Thanks
-Bret
You can change the EGR and the ASV (anti shudder valve) yourself in under 2 hrs total. Save your $$$. EGR $200USD, ASV $130USD... I did it about a month ago. Nothing to it. You didn't say if re-connecting the vacuum hose fixed the boost leak problem or not..................
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