My first post at this nice forum after lurking for years.
I have a stock 1979 360 EH1 with 42.000 miles, one owner
and complete history, newer rebuilt.
It has an annoying slight misfire at idle that I have tried
to track down for a couple of years, without success.
Pulls fine and has no misfire as soon as it leaves the
idle state.
Facts:
Newly rebuilt original Thermoquad
Mopar stock electronic ignition
New spark plug wires
Timing 15 degrees initial without vacuum
Softer springs in distributor according to previous owner
Full vacuum advance
727 transmission
Maximum 18" vacuum in neutral and 16" in gear
Vacuum fluctuating with the slight misfires
Tried troubleshooting:
Pulled plug-wires one by one, all seems to be working
Adjusted idle-mixture for best vacuum
Here is a video of the engine at idle,
first in neutral and then in gear:
