Stock 1950 8BA

Also, check the small wire in the distributor (goes under the points plate) . These eventually lose some insulation and can short out as the plate rotates under load.
 
We changed the plug wires and dist. cap with new ones. Still no change.....mid range missing. Tonight we are going to hook up a vacuum gauge into the passenger compartment and see what the gauge tells us while it is missing.
 
Checked primary wire in dist. when I had it completely apart. Wire had been replaced at one time, and looks like new.
 
When I had the dist. out I checked the bushings. Also cleaned and polished the shaft and cleaned out the oil groove for bottom bushing oiling. Everything was nice and tight. No play in either bushing. Ran it again last night with a vacuum gauge and while driving, when it is missing it is a pretty steady 16" - 17" while holding a steady speed. That tells me there are no weak valve springs or valve problems......but I am still stumped.
 
Your first post didn't list plugs as being new, probably an oversight. Gap at .025? Sometimes new stuff is defective, at this point I would try another set of plugs even if an older set to see if anything changes
 
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