<VV> Now Fuel Pumps

Mark Durham 62vair at gmail.com
Sat Jul 27 22:21:34 EDT 2013

Yeah, when I bought my car I replaced the pump because it was over 20 years
old and leaking, but the new pump is 4 years old now, and I took it apart
to see what it was like inside this spring and both valves looked like new.
So evidently it had updated rubber for the ethanol fuel. It actually puts
out too much pressure causing a problem with smells in the garage by
overpowering the needle and seats, put in a regulator and the problem is
better. Of course, I have made sure the floats are set correctly.  Mark
Durham, Hauser Idaho

On Sat, Jul 27, 2013 at 3:05 PM, Frank DuVal <corvairduval at cox.net> wrote:

> Your test sounds good. I shall modify my statement to include bad pump
> valves to produce the exact symptom of vapor lock.
> Thank you.
> And be careful around the SWAMBO.
> Frank DuVal
> On 7/27/2013 1:43 PM, Smitty wrote:
> > Smitty Says;   Frank I like you.  I don't care what your wife and friends
> > say about you, I think you are OK. GGGG  On one of my many cross
> countries I
> > started experiencing vapor lock symptoms.  (The car, not me).  From KC to
> > Denver I never made a highway stop and got more than a mile down the road
> > without the engine quitting.  Quick fuel stop or stop for a burger at a
> fast
> > food emporium and I would be digging into the soft drink cooler very
> soon.
> > Longer stops like following SWAMBO through a Wallmart and it would fire
> > right up and never miss a beat as long as I kept peddling.  Got to
> Denver 20
> > antique stores and a chest of ice later I broke out the wrenches.
>  Opened a
> > fuel line at a carb after a forced stop and had no fuel there.  In spite
> of
> > the vapor lock symptoms I broke down and put my standby pump on.  Not one
> > more problem the rest of the trip.
> > I am not so stupid as to think that everyone that has a vapor lock
> problem
> > has a weak pump.  But there is one case where a weak pump was the
> problem.
> > Back home I dissected the pump and found the valves were of some material
> > that looked like hard rubber, and one of them was badly deteriorated.
>  One
> > instance does not indicate a trend, but I did experience that one
> instance.
> >
> >
> > Date: Sat, 27 Jul 2013 01:40:37 -0400
> > From: Frank DuVal <corvairduval at cox.net>
> > The test I perform to see if the car has vapor lock, due to high fuel
> pump
> > temperature, is to pour ice or ice water on the fuel pump. If fuel then
> > starts pumping to the carbs and the car starts, there you have it, hot
> fuel
> > pump boiled the gasoline inside to a vapor state.
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Mark Durham
Hauser, Idaho
62 Monza coupe Red/Red 4 speed

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