[T3] Why is it that when I got my 73 SB I never had toturnthekey severa...

[William J]

I realize the airtek pump requires priming since there is no check valve. 
also that the bosch pump check /relief valve can fail in two ways either it 
won't hold pressure or you get no pressue as yours did. I think Jim said 
most he has seen fail in the pressure holding check valve part.
 I saw the post Russ made while doing a search the other day on samba 
telling how his quit and how he knew a VW tech near him that had the ranger 
pump .

 I can deal with adding a primer switch which would at least work faster 
than key cycling. What I need to do now is put the pressure gauge on again 
since it's been at least 6 months since I did it and see how long the 
pressure holds after shutdown instant to 23 PSI then 15 to 18 there about 
after 24 hours then find out why it bleeds down or if it does. I did get all 
new injectors around 2002 all I noticed was before once in a while when 
started I would get a cloud of black smoke that would clear that's all the 
changed it stopped doing that. I thought I might use a fuel line clamp I 
have 4 build up pressure and clamp the pressure line to the left side 
injectors from the pump this will tell me if the pumps check valve is not 
holding . Then there is the regulator I replaced it in 97 it adjusts fine 
yet if it holds is another possible , it seems to since once the thing is 
primed it will start all day  long starts right up.

 The difficult part for me is bending over that rear bumper working in such 
close quarters checking the injectors if they leak down , I don't know how 
long they last and never checked spray pattern or counted drips and timed 
them.
----- Original Message ----- 
From: <Bobsnotch at aol.com>
To: <type3 at vwtype3.org>
Sent: Monday, August 07, 2017 10:42 PM
Subject: Re: [T3] Why is it that when I got my 73 SB I never had 
toturnthekey severa...


> In a message dated 8/7/2017 1:22:37 P.M. Eastern Daylight Time,
> catnine09 at dslextreme.com writes:
>
> This  fuel priming thing still begs to question it never did it before my
> only  answer is the crap fuel because once it's primed it starts everytime
> all  day long until it sets over night then it's 3 key turns more than a
> day
> it's 7 to 9 . So I'll put in a switch and perhaps get a airtex or similar
> just in case . Since the pump works as Jim explained then it's a crap
> design
> the check valve should hold pressure and did so something changed  there.
> Just can't imagine with all these sold with the same pump people  would 
> put
> up with priming like some old hand operated well pump  .
> Well, either the "check valve" is progressively getting more worn  out, or
> you have an injector slowly leaking, or you've got a pin hole in a fuel
> line. I only say that as you're slowly loosing pressure somewhere. And if 
> you
> think adding an Airtex pump will fix it, you're surely wrong. I'll be the
> first  to tell you using the Airtex pump, while a very good substitution 
> for
> the Bosch  pump won't fix the bleed down issue you're seeing the next day 
> (or
> days ) after  using the car. I've got a 71 Square sitting here with an
> Airtex pump in it, and  after a week (or more) I have to cycle the key 
> switch 3
> or 4 times before  starting the car to get the fuel pressure up. Same
> applies if it just sits 1  day, or even 1 afternoon. I suppose you could 
> add a
> separate check valve to  the system if you ran that pump. You'd have to 
> ask
> Keith if adding a check valve  would improve the system with either pump, 
> as
> he's the only I know who is  actually using a separate check valve on his 
> type
> 3. Just so you know, Russ  Wolfe was the guy who found using the 85 Ford
> Ranger frame rail mounted  pump as a good replacement for the Bosch pump. 
> It
> was more price driven than  anything, well that and Russ was trying to get
> home from work. But,  a new Airtex version costs about 85 to 90 bucks, 
> while a
> new Bosch  pump costs 700+ bucks. About the only people who can afford the
> new Bosch  pump are Porsche owners.
>
> And since the original Bosch pump design is such a "crap design"  that's
> lasted and still performing it's job on your type 3 after 44 years, I 
> would
> hope a Ford pump (which is what the Airtex pump is a copy of) lasts at 
> least
> that many years. I know Delphi pumps are good for about 15 years before
> they go kaput, as I've had several do that over the years.
>
> But yes, the "check valve" that Bosch used isn't very good, as it'll  work
> just fine 1 day (after many years of service), and then up and quit the
> next day without any warning. I know, because I had it happen to myself on 
> my
> 71  Notch (I also had it happen on my wife's 70 Fastback) when I was using 
> it
> as a  daily driver. But, it was a used pump (that did function) and was
> probably  stored incorrectly for a few years before I installed it on that 
> car.
> The thing  is, when the check valve goes, it does so without warning, and
> the pump will  keep running, but not build any pressure (it's common 
> failure).
>
> Bob 65 Notch  w/Factory Sunroof converted to  IRS
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL: 
> <http://lists.vwtype3.org/pipermail/type3-vwtype3.org/attachments/20170808/8730cdb7/attachment.htm>
> _______________________________________________
> VWType3.Org mailing list - type3 at vwtype3.org
> To unsubscribe or change subscription options, visit:
> http://lists.vwtype3.org/listinfo.cgi/type3-vwtype3.org
> If you need more help, contact: gregm at vwtype3.org
> 


---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus