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

James Hansen jhsg at sasktel.net
Wed Oct 18 22:05:29 EDT 2006

That would be just fine Bryan.
Pump on the 1.6 NA has identical pumping bits as compared to the higher 
pressure later years.  It has to do with fuel delivery timing- the 
higher pressure gets the fuel in sooner, letting it burn for a longer 
time.  Downside is nitrogen emissions.  Upside is better use of your 
hydrocarbons.  If you're fueled to the nuts, watch the egt's for the 
first bit, as higher pressures give a tad less advance. (takes longer 
for the injector to pop).

I've always had my injectors set to my own spec of 15 bar higher than 
what is called for.  noisier, but starts better- better atomization.


82 Diesel Westy wrote:
> A remedy for the stinking injector, replace them.....
> Just spoke with Part Place, they have no more of the
> 028 130 010 1.9na injectors I got from them years ago.
> They suggested to replace them all with the extra set
> of known GOOD 1.6TD 155 bar injectors I have from a
> 1.6TD A2 Jetta project car.
> So, 1.9NA motor, 1.6na pump, 1.6td 155 bar injectors..
> Does this FLY with everyone?  So a 1.6na pump has no
> problem producing 155bar of pressure to fire the
> injectors, it would have to take a hair longer for
> them to fire, changing the timing a bit....NO?
> I guess you only need the 1.6TD pump for the Aneroid
> and extra fueling then.
> Thanks, Bryan
> --- 82 Diesel Westy <dieselwesty at yahoo.com> wrote:
>> 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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>>> Vwdiesel at vwfans.com
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> Bryan Belman, Pt Pleasant, NJ
> 04 Jetta Wagon TDI PD, 100hp, 5sp   -- running :)
> 82 Diesel Westy 1.9NA               -- running :)
> 92 Jetta Eco-Turbo Diesel           -- not running yet <:>
> 90 Audi 200, 2.2L Turbo FWD         -- runs some times, need to sell :(
> 70 Type 1 stock Beetle              -- Not running well :(

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