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03-07-2006 06:24 PM #1
disconnect vac adv-popping out exhaust
I finally got my damn engine running and I was messing with the timing again. With the vacuum advance hooked up it was about 20 degrees advanced. I plugged the vacuum to check the baseline and I could get it to fire up but not keep running it was so erratic.
It would blast wicked loud pops out the exhaust.
The only thing I could figure is that the burn was starting so late that when the exhaust valve opened it would let out a tremendous amount of energy still being releasing.
Does this make sense?
Also, the more I advanced the dist the better it ran and the faster it idled. It would also quiet down a lot when I advanced it up to about 35.
Should I advance it more since it idles better or leave it lower?
Welcome to CHR. I think that you need to hook up your vacuum advance. At part throttle when cruising you have less air and fuel in each cylinder, and the air-fuel mixture is not as densely packed...
MSD 8360 distributor vacuum advance