<VV> Strange power loss problem

[Kent Sullivan]

One other possibility is a pinhole in the short length of rubber fuel hose
that connects the engine compartment hard lines to the line from the tank. A
pinhole can cause the pump to suck air every now and then.

--Kent
-----Original Message-----
From: virtualvairs-bounces at corvair.org
[mailto:virtualvairs-bounces at corvair.org] On Behalf Of Keith Onchuck
Sent: Saturday, February 04, 2006 7:38 PM
To: virtualvairs at corvair.org
Subject: Re: <VV> Strange power loss problem

OK I managed to get in the garage for a while today. 
I put a fuel pressure gauge on the car and I have narrowed down the problem.
(I do not know why I didn't do this way back when.) The fuel pressure will
hover around 7 but drop to 0 and then slowly build back up.  It seems to be
a random pressure drop.  

I had replaced the fuel pump when this first started so I am not sure that
is the cause.  I have a spare electric pump from another car that I plan to
test. 
If it keeps steady pressure I may just convert to electric.  If it has the
same symptoms then I know to look into the lines and tank for a blockage.

Keith

--- Keith Onchuck <keitho64 at yahoo.com> wrote:

> OK looking for a little more advice.  I replaced the plugs, cap rotor, 
> wires, points, condensor, coil and the problem still exists.  Lets 
> just say I took the shotgun approach on the ignition system since I 
> haven't done anything in 9 years.  The timing is on, I have cleaned 
> the advance weights to ensure that is working and the vacuum advance 
> is working.  I am going to run a compression test next.  Is it 
> possible for the cam gear to have slipped enough to cause a problem?  
> I think my diagnostic skills are suffering since the car has been 
> running so good for so long.
> 
> The only other possibility I see is blockage in the fuel delivery 
> system.
> 
> If you have any other ideas or see areas that I missed I am all ears.
> 
> Sorry if I sound like I am rambling but I am very confused about what 
> is wrong.
> 
> Keith
> 
> --- Keith Onchuck <keitho64 at yahoo.com> wrote:
> 
> > Thanks to everyone for the feedback.  So far here
> is
> > what I know:
> > 
> > The fuel line is not bent nor are there any holes.
> 
> > I
> > was looking at this first.  I did replace the fuel pump so the only 
> > other fuel related issue unless there is a blockage in the tank.
> > 
> > I am focusing on the Pertronix module so I ordered new cap, rotor, 
> > wires, plugs, points, condensor, coil and I am even going to clean 
> > out the advance springs.
> I
> > cannot believe it has been 9 years since I put in the pertronix and 
> > last tuned it up.  Me bad, did not realize it was that long, only 
> > 6800 miles since
> then
> > but none the less probably to long.  The parts should be here by 
> > Monday so I will post a follow up.
> > 
> > Thanks again for the advice.
> > 
> > Keith
> > 
> >
> ****************************************************
> > 
> > I am having a problem diagnosing a strange problem on my 1964 110 
> > 4-speed car.  On acceleration, normal
> or
> > hard, the car will intermittently stumble as if it has run out of 
> > gas.  In some cases the car will completely die.  This first started 
> > late this summer and it
> is
> > becoming more of a normal occurrence where I
> cannot
> > drive the car for any length of time.  When the
> car
> > acts up it takes a long time to start and appears
> as
> > if there is no fuel.  When I check the carbs I can see fuel going 
> > into the engine so I do not think it is an accelerator pump issue.  
> > However I was determined that is was fuel related.  I replaced the 
> > fuel pump and all filters but the problem is still occurring.
> > 
> > I do have a pertronix module in the ignition and after trying to 
> > drive the car this weekend I noticed
> that
> > the car would explode in the muffler when I tried
> to
> > keep the car running.  So I started to think maybe the pertronix 
> > module and/or ignition system is
> suspect. 
> > I
> > am in the process of replacing the module with the old stand by 
> > points and condenser.  The wires, cap, rotor, plugs, coil and timing 
> > all appear to be good but I ordered new just to be safe.
> > 
> > I have two questions:
> > 
> > 1.	Having never experienced a failing pertronix
> > module
> > does this sound like a possibility?
> > 2.	Is it possible there is a block in the fuel
> tank
> > that is causing an intermittent failure of fuel delivery?
> > 
> > Thanks
> > 
> > Keith
> > 
> > 
> > 
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> 
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