In your second video, sounds like pinging (hard to tell) can be heard. Go down the list.
- Make sure your points are clean and properly gapped. Use a points file.
- Make use your fuel bowl and filter are clean/clear.
- Since the problem started when you adjusted the dizzy - and it sounds like you have pinging, re-check it.
- Check the carb's rich/lean setting and also idle setting.
With the pinging at higher RPM, suspect the timing advance. Check the vacuum and centrifugal advance. Check that you are getting vacuum at the disty and also make sure the centrifugal weight springs aren't broken.
[edit] From your other videos, looks like you already checked the advancing mechanisms in your disty. Try timing then carb, then timing, then carb. There is a little interplay there. One improves and slightly changes the other so you need to dial them in a little to get them to work together. Another thought is maybe the float setting in your carb.
Last edited by lumpydog; 02-06-2016 at 07:47 AM.
1968 Series IIa
1997 Defender SW (Original Owner - Sold)