<VV> Spyder Bucking/Stalling problem - more clues!

[Ron]

Did you try it with the fuel cap loosened?
RonH

----- Original Message ----- 
From: "Doug Mackintosh" <dougmackintosh at yahoo.com>
To: "Virtual Vairs" <virtualvairs at corvair.org>
Sent: Tuesday, July 08, 2008 7:11 PM
Subject: <VV> Spyder Bucking/Stalling problem - more clues!


>
> I have continued trying to diagnose my daughter's Spyder's 
> bucking/stalling problem I posted a few days ago. Here is an update on the 
> current symptoms, the ideas folks have suggested, and what I have tried so 
> far:
>
> Symptoms:
>
> Car starts fine and drives fine at first. After about 15-20 minutes on the 
> highway (approx 60 MPH) it stalls. After sitting a minute, it will restart 
> after a few seconds of cranking. Tonight when we tried it, it took 10 
> seconds of cranking after stalling. Then I turned it off, let it sit about 
> 30 seconds, and it restarted instantly. Once it restarts, we can drive it 
> several more minutes (but it appears it doesn't go as far after the 
> restart before it stalls again). If we drive slower it seems to last 
> longer. Tonight, after it stalled, we drove back at around 50 MPH and it 
> made it almost all the way back before stalling. If I had driven at higher 
> speed, it would have stalled sooner.
>
> Here are the ideas people have suggested, or I have thought of. I have 
> shown in brackets what we have tried or checked out so far. The numbers 
> are the number of folks making that suggestion:
>
> Note, we have already replaced the distributor body to eliminate a sloppy 
> shaft which was causing erratic point operation. This cured another 
> problem (difficulty revving over 4000 RPM and an erratic tach needle). 
> This did not have any effect on the above symptoms.
>
> 1 - Point wire [LOOKS GOOD, NO WEAK SPOTS]
> 2 - Clogged fuel sock or filter
> 1 - Fuel related
> 5 - Coil [RULED OUT - REPLACED WITH KNOWN GOOD]
> 1 - Distributor
> 1 - Coil feed wiring
> 1 - Replace distributor
> 0 - Radio capacitor [RULED OUT - REPLACED WITH KNOWN GOOD]
> 0 - Clogged AC fuel filter
> 0 - Junk in tank that floats over pickup when tank ~ 1/4 full
> 0 - Undersize orifice in carb inlet / needle seat [RULED OUT - PROBLEM DID 
> NOT START WITH LAST CARB REBUILD; RECENT CARB REBUILD DID NOT CHANGE 
> SYMPTOMS]
>
> The fact that it takes some cranking to restart, but then restarts 
> instantly if shut off makes me think fuel starvation.
>
> HELP! This problem is driving me crazy(er)! Any more ideas?
>
> -- Doug Mackintosh
> Corsa member since 1996
> Corsa/NC member since 1996, Virtual Vairs member
> Corvair owner 1969-1971 and 1996-on
>
>
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