Glenn, what is the possibility that timing might be your problem?
Patrick Bowen
-----Original Message-----
From: trunnell@mindspring.com [mailto:trunnell@mindspring.com]
Sent: Friday, March 24, 2000 1:21 PM
To: spitfires@autox.team.net
Subject: Stromberg - at the end of my rope (long)
Hi all,
For the last two years I have been battling a problem with my car that has
reduced the fun of owning it by at least 50 percent. I have asked for
advice on this problem before, but I hope that someone will have a new
insight. My problem in a nut shell is that my car runs very badly at idle
and seems to suffer from a vacuum leak that causes it to run very lean.
Unless the needle (B1DL) is set to full rich the car will barely idle at
all. I have tried in vain to find a vacuum leak using carb cleaner and the
carb has been rebuilt by both myself and Apple hyd. I believe that the carb
is original to the car, however the brass tag is missing so I cannot be
certain. The rest of the car, ignition, compression etc. is new or rebuilt
and seems to function well as far as I can tell. Using the colourtune plug
the color is orange, but if I adjust it until it starts to turn blue the car
will start to miss and stop running. If I hold my hand over the mouth of
the carb to choke off the!
!
!
airflow the idle jumps up, indicating to me at least that there is a vacuum
leak or the carb is just too lean. On the vacuum gauge the manifold vacuum
is about 18" at idle jumping to 21" when I manually block the carb off. I
have a spare intake manifold that I am going to install this weekend to see
if that makes a difference. Has anyone had trouble with the intake cracking
or becoming so porous that it causes this kind of problem? I also plan to
block off every vacuum outlet coming from the carb to eliminate every
possibility of a leak. I hate to let this thing beat me, but a weber is
becoming more and more attractive.
Thanks for letting me rant, any advice is gratefully appreciated.
Glenn Trunnell
'76 Spit
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