[T3] More FI questions

[Daniel K. Du Vall]

Hey Jim, probably going to be placing an order with you soon just want to get a comprehensive list going before I order ;-)

Daniel Du Vall
http://1peter4-10.org
http://volkswageninsanity.us


-----Original Message-----
From: type3-vwtype3.org-bounces at lists.vwtype3.org [mailto:type3-vwtype3.org-bounces at lists.vwtype3.org] On Behalf Of Jim Adney
Sent: Sunday, January 20, 2013 11:29 AM
To: type3 at vwtype3.org
Subject: Re: [T3] More FI questions

On 19 Jan 2013 at 12:31, Max Welton wrote:

> --- On Sat, 1/19/13, Daniel K. Du Vall <dduvall at 1peter4-10.org> wrote:
> 
> > I am assuming since these Injectors  been sitting that I have that 
> > it's a high possibility they are dead.

Use the corner of your fingernail to try to push in the pintle in the end of the injector. Good ones will move a barely perceptable amount, maybe .005". Bad ones will be stuck. Stuck ones are probably rusted beyone redemption. Sometimes the stuck ones can be broken free, but the those almost always end up with awful spray patterns, due, presumably, to rust or pits in the spray nozzle or pintle. Good ones may still leak beyond saving.

> I'm wondering if there are places that will recondition those injectors. Maybe these guys?
> 
> http://www.ravenworksllc.com/page.cfm/FUELINJECTOR.html

I have access to a similar, but even more extensive, tool at a local shop. I've spend quite a bit of time sorting thru my "dead" injectors to pick out the good ones. What I've decided is that ultrasonic cleaning can remove gas residue, but it doesn't fix rusty injectors. 
I've spent days working on batches of injectors and only seen slight improvements. The shop owner tells me that injectors from certain makes tend to respond well to cleaning, while others don't. He's not familiar with our old stuff, but what I take away from all this is that some styles of injectors are more likely to collect gunk and respond to cleaning, some collect gunk but cleaning doesn't help, and some just don't seem to collect gunk.  

>From my experience, I'd say that we're in the lucky latter group. I have never seen any benefit from routine cleaning of our injectors. 
Our injectors seem to last forever, unless they've been taken out of service and allowed to dry out and rust.

I have bunches of old used injectors stored now in kerosene, but I'm afraid that most of them spent years drying out before I started doing that. I'm afraid that the percentage that's salvagable now is pretty small. I suspect that my odds would have been much better if I had stored them all in kerosene from the day they were removed from service.

As many of you probably realize by now, I HATE to give up on almost anything and replace it with something new, but I've just about given up on reclaiming used injectors that were taken out of service long ago and stored dry for years. They almost never seem to recover.

Yes, I have new ones, but in more than 40 years, I've only replaced about 8 injectors, and only about half of those were really "known" 
to be bad. One was non-Bosch.

I also have almost any other FI part you might need, either used or NOS.

--
*******************************
Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
*******************************

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