OK so my ED Dual Carb Civic needs help. OK I need help with it..
Cold start, turn key, starts fine, idles well for a few seconds. Then the idle starts to drop low and chug. If left long enough without driving off or bliping the throttle it will stall. Plus the clouds of black smoke out of the exhaust and stain on the ground behind the car can't be ignored.
Once warmed up, the smoke clears, the idle is high (2k rpm), dropping the idle back to normal with the adjustment screw is fine and you can now drive it like normal all day. But next day same same.