[Vwdiesel] What makes an injector stick and make a sound like you have bl...

[82 Diesel Westy]

Thanks James and Andrew for a good explaination of
this.  These injectors only have about 17K on them,
but even new, like within the first 1000 miles of this
motor runnning, it did this once or twice.  They were
a bargin basement special from The Parts Place, $100
CASH only for 4 injectors, speced as 1.9NA injectors.
So, chances are they were seconds and Jack got a bunch
of them to unload.  Manufacturing flaw here.
I think only one is bad but will buy 2 new injectors
and swap them around to see if I can find the bad one.

I am glad I have been shutting it down ASAP when this
happens.  I have been able to just restart in a few
minutes and it resets, but the issue is just going to
start happening more and more I guess.

Thanks, Bryan from NJ
This is way more than a food for thought issue

--- James Hansen <jhsg at sasktel.net> wrote:

> Naw, Andrew is right Bryan.
> A stuck injector with no spray pattern makes a dandy
> high pressure 
> piston drill.
> Rev the motor? Maybe just once or twice, but it
> usually is not a clear 
> out the bugs/ Italian Tuneup issue, it's got some
> varnish stuck to the 
> pintle, or a speck of gunk or dirt attached to same
> holding it open.
> 
> The first time it happened is a warning to have a
> look.  Second is the
> injector calling you by name loudly. Third time is
> the injector doing a 
> pole dance to AC/DC's Sink the Pink with you in
> squatter's row.  Time to 
> R&R at the very least the bad one.  At some point it
> will stick and stay 
> stuck when you are miles from home on a deserted
> road late for an 
> important meeting, tool kit left at home in the
> shed, extra injector and 
> socket loaned out, and a dead cell phone with the
> car charger in the 
> other car.
> 
> Injectors are CHEAP compared to a motor.
> 
> 
> > Still wondering why stopping the motor clears it
> up
> > and it does not happen again for a long time?
> 
> if the problem is varnish on the pintle, the OD of
> the pintle gets 
> bigger due to varnish.  When things cool, it
> unsticks when it cools and 
> shrinks.
> 
> 
> > As always in my case, no easy fix here, but I will
> > shut the motor down as soon as it happens, as I
> have
> > been doing.  Again, it has not ever happened under
> > load on the highway, only while coasting to a
> stop.
> 
> You won't hear it very well under load.
> Plenty of neighbors notice this has happened to an
> injector on their 
> tractor engine when the power drops off, and the
> crankcase vent starts 
> to blow more smoke than the exhaust pipe.  No miss,
> no sputter, just a 
> stuck injector that is overfueling with waaaay too
> much advance, 
> therefore running hotter than the rest, enough so to
> dig a hole in the 
> piston directly under the injector in a direct
> injection motor, or under 
> the precup on an indirect injection motor.
> > 
> > 
> > Well, I will keep this as food for thought.
> 
> Feast well, for tomorrow you may walk.
> -james
> 
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