<VV> Spyder bucking etc

[djtcz at comcast.net]

snipped and bottom posted 
-------------- Original message -------------- 
From: Doug Mackintosh <dougmackintosh at yahoo.com>
Subject: Re: <VV> Spyder Bucking/Stalling problem - Final Answer!

I finally fixed the bucking / stalling problem I posted a while back. Thanks to 
all for the many suggestions, many of which I tested before landing on the 
actual culprit.
?
For those who have forgotten, the symptoms were:
?
- Car started and ran OK.
- After 10-15 miles it would start bucking, or just die. 
- After sitting a minute, it would restart, with some cranking required.
- Higher speed and harder running aggravated the condition (more frequent 
stalls)
- Lower fuel level also seemed to aggravate the condition

This weekend, I finally got around to checking the tank and lines (while the 
tank was full I checked out other possibilities). I have a filter mounted under 
the car?behind the tank, with a hose from the tank to the filter, and another 
hose from the filter then looping around into a hole in the cross brace, then 
back out a different hole and then to the steel line going to the back of the 
car. When I disconnected the hose at the steel line heading to the rear, I 
only?got a small trickle of fuel. When I disconnected the?hose from the sender, 
I got a very strong stream out of the sender. Based on this I believe the filter 
(very dirty) and/or the long hose that ran through the cross brace (possibly pinched) were causing the restriction. 
?
I removed the sender and checked the tank (no obvious problems inside), replaced 
the pickup sock (dirty but not dirty enough to prevent a strong stream from the 
sender), replaced the hoses and filter, and blew out the line running to the 
rear. I also changed my filter setup to avoid routing a hose through the cross 
brace (to avoid possible pinching).
?
After that I took it for a long cruise and the problem is gone!
?
There is one mystery I may never resolve. When I did the initial fuel flow tests 
(at cranking speed) on the fuel pump I got 1 pint in 26 seconds. My estimate of 
fuel consumption during my test runs (when it stalled) was about 1/4 of this 
rate. Seems like the restriction in the hose and filter (if it was enough to 
cause the stalling) would have kept the pump from being able to deliver that 
flow.

-- Doug Mackintosh


1965 Chassis Shop Manual - section 6-5 Engine tune up (no mileage specified that I could find).
Test compression, Clean and inspect Spark Pulgs (sic), rotate dist cam lubricator 180, inspect the fuel lines, and "if a complaint of poor high speed perfromance exists on the vehicle, fuel pump tests should be performed."  Section 6M-26 says "Always check the pump while it is mounted on the engine."

Dan Timberlake 
Westford, Massachusetts, USA