<VV> Fuel delivery question

[J R Read_HML]

Corrections....

#1 was supposed to say CUP instead of cap

#2 was supposed to say  you MAY simply

Later, JR

----- Original Message ----- 
From: "J R Read_HML" <hmlinc at sbcglobal.net>
To: <virtualvairs at corvair.org>; "Chris" <vairchris at gmail.com>
Sent: Saturday, April 19, 2008 3:30 PM
Subject: Re: <VV> Fuel delivery question


> Chris,
>
> A couple of things come to mind.
>
> 1.  Modern gas formulas are tough on some rubber components.  See if the
> accelerator pump cap (made of [some kind of] rubber) has or is
> disintegrating/ed.
>
> 2.  On the choke, you simply be missing the upper portion - which screws 
> to
> the lower portion through the hole in the shroud.
>
> 3.  (well more than a couple I guess)  How hot is the engine getting when 
> it
> stalls.  You might be dealing with an over-heat situation - leading to 
> vapor
> lock.
>
> Later, JR
>
> ----- Original Message ----- 
> From: "Chris" <vairchris at gmail.com>
> To: <virtualvairs at corvair.org>
> Sent: Saturday, April 19, 2008 3:16 PM
> Subject: <VV> Fuel delivery question
>
>
>> Sorry if this is a little long, but I want to be sure you give me the
>> right
>> advice.
>>
>>
>>
>> My vehicle is a 61 Rampie with a 62 80 HP engine and 63 carbs (Special
>> thanks to Grant Young for helping me figure all that out).  On the left
>> hand
>> side, the choke rod is broken off under the shroud, so the choke on that
>> side was free to do what it wants.  On the right, the automatic choke is
>> hooked up right.
>>
>>
>>
>> Three different times in 1000 miles it has suddenly behaved as though it
>> were out of gas, even though the gas tank is full.  A little sputtering
>> and
>> surging followed by a stall and coasting to the side of the road.  If I
>> crank it right away it won't start.  If I let it sit 10 minutes and then
>> crank it, it starts up and goes on as if nothing happens.  My first
>> thought
>> is that the loose choke on the left had inadvertently closed and choked
>> the
>> engine to a stall.  However, this last time, with my friend available to
>> crank the engine for me and me holding the choke open, I was still unable
>> to
>> get the engine to start.
>>
>>
>>
>> I had him pump the gas a couple of times, and didn't see anything squirt
>> into the throat as I should have.  So, I'm concluding that I have a fuel
>> delivery problem.  I pulled the stones out, and they are clean and new
>> looking, so I focused on the fuel pump.  I ordered a new fuel pump from a
>> vendor.  When I went to put it on, I stripped the right fuel line.
>> Knowing
>> that I would have to replace it, I took it off the carb too.  When I
>> dumped
>> the gas out of it onto a paper towel, there was black debris in it.  It
>> seemed rubbery, so I just figured it was bits of the diaphragm from the
>> fuel
>> pump.  I took off the left fuel line too, and didn't find any debris in
>> there.  There was a little more debris at the fuel outlet when I
>> disconnected the pipe from there too.
>>
>>
>>
>> So, I put the new fuel pump in.  Then, being the type who does this, I
>> took
>> the old fuel pump apart.  The diaphragm was in perfect shape.  No holes 
>> or
>> missing pieces.  So now I'm wondering where this debris is coming from 
>> and
>> why it intermittently blocks fuel delivery to the carbs.  I'm guessing 
>> you
>> are all going to tell me to pull the gas tank, and I kind of don't want 
>> to
>> because it is totally full.
>>
>>
>>
>> So, does this story have any specific meaning for anybody?  I'd like to
>> get
>> the fuel delivery bugs worked out, as it stalled out on a busy highway
>> last
>> time, and posed real danger for me and others.
>>
>>
>>
>> Also, any good tips of getting the upper choke rod out of the lower one
>> when
>> it is broken off below the shroud?  I'm beginning to accept that fixing
>> that
>> will be a big job, but I'll accept any tips you all can throw my way.
>>
>>
>>
>> Thanks to all.
>>
>>
>>
>> Chris
>>
>>
>>
>>
>>
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>
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