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<DIV>In a message dated 8/7/2017 1:22:37 P.M. Eastern Daylight Time,
catnine09@dslextreme.com writes:</DIV>
<BLOCKQUOTE
style="BORDER-LEFT: blue 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px"><FONT
style="BACKGROUND-COLOR: transparent" color=#000000 size=2 face=Arial>This
fuel priming thing still begs to question it never did it before my <BR>only
answer is the crap fuel because once it's primed it starts everytime <BR>all
day long until it sets over night then it's 3 key turns more than a day
<BR>it's 7 to 9 . So I'll put in a switch and perhaps get a airtex or similar
<BR>just in case . Since the pump works as Jim explained then it's a crap
design <BR>the check valve should hold pressure and did so something changed
there. <BR>Just can't imagine with all these sold with the same pump people
would put <BR>up with priming like some old hand operated well pump
.</FONT></BLOCKQUOTE>
<DIV><FONT style="BACKGROUND-COLOR: transparent" color=#000000 size=2
face=Arial>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.</FONT></DIV>
<DIV><FONT style="BACKGROUND-COLOR: transparent" color=#000000 size=2
face=Arial></FONT> </DIV>
<DIV><FONT style="BACKGROUND-COLOR: transparent" color=#000000 size=2
face=Arial>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.</FONT></DIV>
<DIV><FONT style="BACKGROUND-COLOR: transparent" color=#000000 size=2
face=Arial></FONT> </DIV>
<DIV><FONT style="BACKGROUND-COLOR: transparent" color=#000000 size=2
face=Arial>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).</DIV>
<DIV><BR>
<DIV><FONT lang=0 size=2 face=Arial FAMILY="SANSSERIF" PTSIZE="10">Bob 65 Notch
w/Factory Sunroof converted to
IRS</FONT></DIV></DIV></FONT></FONT></BODY></HTML>