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Old June 8th 06, 08:05 PM posted to rec.autos.makers.vw.aircooled
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Default 1974 SB - Replacing manual fuel pump with an electric (fuel delivery problem)

Jim:

Thanks for "speedy" reply!

Sorry I couldn't resist!

Here is the issue at hand. I will be driving the car for a period of time,
all of a sudden it spits an sputters and dies. If I try to restart it,
(after many pumps of the pedal) it will turn over, then die again. (some
sort of fuel delivery problem, I think). Almost like the fuel is being
chocked off. I have already replaced the manual fuel pump, made sure the
fuel lines are NOT close to the engine, replaced the fuel filter, and even
tried running with the fuel cap off. (Thinking it might be a venting issue).
Could there be an issue of the engine causing the rod from the fuel pump to
cease (stopping fuel flow)? Plus the coil gets quite hot.

If the car sits, and "cools" off, I can start it right up again.

BTW the gas flows from the fuel line fine.

What about vapor lock. If the engine is "operating-properly" I will see the
fuel in the filter bubble (almost looks like it's boiling) (air)?

Sorry I'm being kind of random, but I can't trust the car at all.

Any other info/comments would appreciated.

Thanks.




"Speedy Jim" > wrote in message
om...
> Steve wrote:
>
> > I have a 1974 SB with what I call a fuel delivery problem. I want to go
> > ahead and replace the manual fuel pump with an electric, however, I

don't
> > know what the GPH rating is.
> >
> > I have looked at the current manual pump, and it has no information on

it.
> >
> > What is the "stock" GPH rating that would apply? I have a choice of 25,

30,
> > 35 & 45 GPH, or am I barking up the wrong tree, and it could be a carb
> > problem?
> >
> > Thanks.
> >
> > Steve
> >
> >

>
> If you have a clogged main fuel line, neither pump will work.
> There is absolutely no reason that the stock pump can't
> be made to work (or replaced with like, if bad).
>
> If the car gets 30 MPG and is going at 60 MPH, that is
> consumption of only 2 GPH.
>
> You can test the fuel line by disconnecting it from the
> pump and routing it into a suitable gas can.
> Jack the frt of the car up.
> Fuel should flow freely (steady stream) into the can.
> If you get a dribble, the line is clogged.
> If you get good stream, allow it to run for several
> minutes. This will check for proper tank venting.
>
> If *your* stream is a dribble, you probably have BPH. <g>
>
> Speedy Jim
> http://www.nls.net/mp/volks/



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