[T3] Car Cures Itself...

[Tony Rongey]

I don't think you have to get air in, unless somebody has actually sampled the lines and found it there.  I would think that replacing 15' of liquid fuel with 15' of vapors would be enough to keep the car from starting.  That simplifies the problem to just the boil-off.
The reason I brought up the check valve is because it's taking five or six clicks to start.  My car does this every morning, and it will start with two clicks so it sounds like either the check or the regulator is bleeding off too fast.
PS: Are you still fixing the pumps?  I've got one or two that I should probably get done to have good spares.
Tony
'70 Fastback AT/FI daily driver

From: Jim Adney <jadney at vwtype3.org>
To: type3 at vwtype3.org 
Sent: Thursday, June 27, 2013 9:32 AM
Subject: Re: [T3] Car Cures Itself...


On 27 Jun 2013 at 6:19, Tony Rongey wrote:

> Jim,
> I thought you were the one who explained this to me, but it might have been Russ or Tram.  The theory that I've heard is that the engine heat causes the fuel in the exposed fuel hose to evaporate.  Since our cars are full of old worn parts neither the pressure regular or the check valve in the pump are up to the task of holding pressure for very long.  Once everything cools down you're left with a fuel system full of low-pressure vapors so the whole ring has to be loaded up before it will start.
> Sounds to me like he needs your fuel pump rebuild (if you're still doing that), because his check valve has failed.

That's my theory, but I don't have a COMPLETE theory. The incomplete 
part comes where I can't explain where air gets in to replace the 
fuel vapor.

...
*******************************
Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
*******************************

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