[Vwdiesel] Limp mode

[Shalyn Shourds]

Been too busy/exhausted lately to think about the car.  Sadly, I'm probably
going to have to rent (a gas) one for my upcoming trip.  No limp mode
lately, but still noise and reduced power. I've ordered an N75 and an MAF.
Not super expensive and easy to replace.

What was your experience cleaning the turbo vanes?  I've read summaries of
techniques including oven cleaner.  How was getting the unit off/on?
Really tight back there.

-Shalyn
On Jul 16, 2015 6:18 AM, <pmdolan1 at sasktel.net> wrote:

>  Pretty sure the MAF would throw a nasty big code if it was not doing its
> job.  Also, think N75 does as well (only had that happen once, can't
> remember what VAGCOM said about it)
>
>
>
> I have had vanes stick in ALH, and it does exactly as you have described.
>  Cleaning them is probably job one.  This happened with N75 failed and
> engine was smokey for a few days - thus sooted vanes in VNT 17
>
>
>
> Pat
>
> On Wed, 15 Jul 2015 22:18:02 -0500, Shalyn Shourds <
> tippedcows.spiltmilk at gmail.com> wrote:
>
> While looking at the vacuum lines, I moved the big line to the vacuum
> booster to check for leaks. I didn't find any, but I must have re-seated
> the hose ends because it's not perfect, but it is better. It's at least
> driveable, so it's likely the vacuum wasn't enough to run the turbo or the
> brakes.
>
> I may go ahead and replace the MAF and/or the N75. I really should check
> over the turbo vanes and replace all the relevant gaskets. I see that
> there are people who have pulled apart and cleaned the turbo. Anyone dove
> in there? Dreading pulling the unit and the manifolds more than anything.
> If anything because it's 100ºF out there.
>
> -Shalyn
> On Jul 15, 2015 8:03 AM, "Hayden Chasteen" <dieseltdi at verizon.net> wrote:
>
> > Going imto limp mode could be caused by a number of things, sticking
> turbo
> > vanes causing an over boost, bad N75 valve, bad vacuum/boost lines but if
> > you are loosing brakes also, I might suggest the vacuum pump. Just some
> > thoughts. Hayden
> > > On Jul 13, 2015, at 1:54 AM, Shalyn Shourds <
> > tippedcows.spiltmilk at gmail.com> wrote:
> > >
> > > 00 TDI. I've been losing some power lately and then last week it went
> > into
> > > what I'm pretty sure is limp mode. I had it floored and was losing
> speed
> > > on a slight incline. It was more or less back to its usual somewhat
> > > diminished power after a restart. It has done that twice now. No codes.
> > >
> > > I replaced almost all the vacuum lines. The one from the pump to the
> > brake
> > > booster was surprisingly not cracked. That didn't help. I do have a
> > high
> > > whine/whistle that may be turbo related and I have very rarely lost
> power
> > > brakes if I use them in rapid succession.
> > >
> > > I checked earlier and had 15 inches of vacuum at idle. Stomping the
> > brakes
> > > repeatedly in the driveway would drop the vacuum, but I would think
> > that's
> > > normal.
> > >
> > > I'm researching quickly, but have a long ways to go before I understand
> > the
> > > vacuum controlled system and how that interfaces with the ECU. I
> > probably
> > > need to pull the turbo and replace the surrounding gaskets, but I, like
> > my
> > > car, haven't had a lot of energy lately and am trying to figure out
> > what's
> > > going on before I use up my limited energy wrenching on parts that
> aren't
> > > broken. Troubleshooting me is sadly in the hands of &$@# doctors.
> > >
> > > I'd appreciate any advice on what direction to look. I have a VAGCOM,
> > but
> > > haven't learned much beyond pulling codes.
> > >
> > > -Shalyn
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