[Vwdiesel] 01 TDI, Sudden loss of boost

[James Hansen]

Yeah, probably stuck vanes, you can clean those, it's a usual thing if you
have a Ford powersmoke with a vnt, and does not require a new turbo.  As
soon as the ecu doesn't see the boost it called for it takes warp drive off
line and puts it into limp mode, which is why you went to zero boost so
abruptly. Probably had some actuator movement, just not enough to get the
vanes to do the thing needed.
-james

-----Original Message-----
From: vwdiesel-bounces at vwfans.com [mailto:vwdiesel-bounces at vwfans.com] On
Behalf Of Tad
Sent: March-11-14 12:09 PM
To: vw-tdi; VW diesel mail list
Subject: [Vwdiesel] 01 TDI, Sudden loss of boost

So I have a 2001 Golf TDI with close to 190k on the clock.  Original turbo,
intake never cleaned (!), most of it's life on BD of various concentrations.

I was driving home from work last night and I noticed I had zero boost as
indicated on the mechanical gauge.  Power was, of course, low.  After some
experimentation, I was able to get the needle to just barely move off the
stop at WOT.

I cautiously proceeded home and checked things out under the hood, hoping
for a blown hose or something, but everything seemed intact.

I snaked my arm down to the turbo to check connections and everything seemed
intact.  While I was down there I located the VNT lever and worked it back
and forth for a bit - seemed a little sticky/crunchy.

Went for a test drive and lo, boost had returned!

I assume this means my VNT is full of crud and needs cleaning/replacement.
 I know some folks have talked of using SeaFoam or some such but that
frankly sounds a little sketchy to me.

With such high miles on the turbo I may just look at replacing it.

Any experience/advice from the group?

Thanks.
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