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OD and Carb questions

To: Spitfires@autox.team.net
Subject: OD and Carb questions
From: "Greg Rowe" <growe58@hotmail.com>
Date: Sun, 28 May 2006 22:09:08 -0400
Im working on the 1979 Spitfire (California model) that I got a couple of 
months ago.  The emissions system is pure stock.  I have a few last problems 
Im trying to sort out (at least I hope these are the last)

Overdrive  I got this working by replacing the solenoid and gear shift 
switch and topping up the gear oil.  But after I totally reassembled the 
interior, the OD stopped working shortly after.  Arghhh  I did notice that 
one of the wires going to the gear shift switch was a little frayed although 
it lit my test lamp without any problem.  I cut, restripped and re-crimped 
the wire and the OD came back but I dont know if its a intermittent 
problem or I fixed it.  Does the solenoid need some minimum amount of 
current to work and possibly the frayed wire was enough to light the test 
lamp but not engage the solenoid?  Does that sound reasonable (he asked 
hopefully)?

Carb  I have a random low speed stumble that seems unrelated to anything 
else.  Its bad enough to stall the car when starting from a stop.  The 
other day, the car wouldnt start at all and I traced it to a stuck air 
valve in the carb.  I was unable to lift it with my finger and had to pry it 
up with a screwdriver.  Once it "unstuck", there was no further sticking.  I 
dissembled the carb and as best as I can tell, theres no place that it 
should be sticking, everything is smooth and now moves easily by hand.  But 
who knows whats happening in there when Im actually driving?  What causes 
the air valve to stick and what can I do about it?  (FYI, the ignition 
system on the car - wires, distributor, ignition module - were all taken 
from my old car where they worked fine.  The plugs were cleaned and gapped.  
I replaced the fuel filter and checked the floats for height and for 
gasoline in them.  I know that most carb problems are really ignition 
problems but it seems that if I had an air valve sticking once for sure and 
Im still getting symptoms like a sticking air valve, then I probably still 
have a sticking air valve).

Thanks in advance!

Greg


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