<VV> Is it vapor lock

[Larry Forman]

Hi Chris,
My Greenbrier did the same thing recently, AND it has an electric fuel pump so I KNEW it was not vapor lock.  After trying several things, it finally turned out to be an Ignitor I that was failing when hot.  Now, I am a huge fan of Ignitor I's and have run many without a failure until now.  I hope to perform a failure analysis on this module at work, since I have access to the equipment to do it, like a real-time X-ray and C-SAM (C-mode scanning acoustical microscope) and the ability to micro-cross-section the module, but have not had the time recently to play.

Sooo, my advice is to try swapping out the most logical parts and see when the problem disappears:
1. Swap out the ignition coil, if you have the stock one, just replace it with a new, modern high output coil.  The nice thing is that ignition coils swap out really fast.
2. Swap in a new points/condensor set or replace an Ignitor with a stock points set or another Ignitor.
3. Convert to an electric fuel pump if you are running a stock fuel pump OR try another fuel pump.
4. Make sure that the stock fuel pump push rod is the correct length and has not worn down to a shorter length.

My guess is that since it dies without stumbling first then you have an intermittent ignition failure rather than a fuel delivery issue, so my bets are on the first two suggestions.

Good luck and please let us know what you find as the cure.

Larry
----- Original Message -----
From: "Chris C, Warwick RI" <ricorvair at cox.net>
To: virtualVairs at corvair.org
Subject: <VV> Is it vapor lock
Date: Wed, 27 Jul 2005 09:34:18 -0400

> 
> The patient:  63 monza 900, pg.  Stock motor, no mods.  Drives 
> better and better each week.  Have been taking longer and longer 
> drives.
> 
> The symptoms.
> 
> 95 and pretty muggy.
> 
> Drives nice to the cruise.  Go to back it into my spot.
> 
> Stalls.  It never stalls.
> 
> Very windy, feels 15 degrees cooler (6 miles away).
> 
> Push it the last 4 feet (ever feel like everybody is looking at you).
> 
> Check the carbs.  Move the linkage and small drops from the right 
> carb.  None from the left.
> 
> Check the clear in-line filter.  It has gas.
> 
> 2 hours later, the engine is cool, and she starts up and drives 
> like nothing happened.
> 
> Freek incident, vapor lock?
> 
> Anything I can do to avoid it.
> 
> 
> 
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