Made great progress this weekend but am still dealing with hesitation as I accelerate (go from idle to off idle) and an idle speed of 1100-1200 rpm.
Purchased two manual choke adapters and installed them.
Still starts easily but this time I can move the butterflys all the way open - the rich fuel mixture went away. I haven't given up on the thermostatic choke system, just inserted some improved control so I can drive it. The other change was to install E-3 plugs. (A new design where the spark travels to a "C" shaped ring standing around the outer edgge rather than a single bar standing above the porcelain) Pulled a plug after driving 3-5 miles and they look great. Am going to an out of town car show over the holiday and will know better when I get back home on Saturday (120 -150 miles round trip)
When I manually move the choke assembly's butterfly to wide open the internal lever controlling air movement across the coiled spring and into the intake manifold closes so the vacuum loss during cold start is closed off when the engine is hot. It seems to me there is some small amount of vacuum loss still occuring at this point. Would it be worthwhile to plug the copper piping going from the base of the carb to the thermatic choke assembly?
I need help to understand the components of the stat cover and spring assembly. Are there other parts in addition to the cover, cover gasket, coiled spring and thin wire wrapped around the cover post and over the edge of the spring? When the spring is under tension to adjust the butterfly position it relaxes due to heat but it does not drag the piston / butterfly assembly back to the location where the butterfly is wide open. Is it only vacuum that finishes moving the butterfly to the verticle position? If not vacuum, how is the arm of the piston connected to the spring?
Last question, how many coils should I remove from 1- the power piston or 2- (from above or below the pump plunger)? Transition from off idle still has not improved.
Thanks, Ted
